Questions tagged [electrical]

Concerning the main electrical system of a motor vehicle or internal combustion engine. Consider using [tag:electronics] for radios and other such systems. Use [tag:electric-vehicle] for questions about electrical powered vehicles and their unique systems.

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8
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1answer
187 views

What is the name of the following electrical symbol?

What is the name of the following symbol (in red) : This is from the front wiper motor schematic of a Toyota Corolla car. First time I have seen this. I searched a little bit on various websites but ...
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2answers
9k views

Battery Light Won't Go Off Since Changing Battery

I just changed the battery on my 98 Mazda 626 and now the battery light comes on and stays on after starting the car. I checked the battery and it's reading 12.8v with the engine off, and 13.8 with ...
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1answer
1k views

ABS Pump motor disassembly

I have the strong suspicion that the motor of the ABS Pump is not working anymore in my Ford Transit 2.2L (2008). So I want to remove the motor and check the carbon brushes. As I see it the motor ...
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2answers
465 views

Coolant Level Sensor Connector Replacement

I'm looking for a replacement male connector to fit this coolant level sensor from a 1989 VW Jetta. Finding replacement sensors is straightforward, but what does one do when repairing a missing ...
8
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1answer
801 views

battery tender keeps charging

Results for: so I have a motorcycle and use the Optimate1 battery tender. One day while using the tender I left and came back 6 hours later to find the Optimate still charging my battery. The battery ...
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4answers
3k views

Is it ok to plug in battery backward to do compression test?

On engines with compression release valves, the recommended method for testing compression is turning the engine in reverse direction. I'm working on a lawn tractor (with a Kholer K241AQS), so there ...
7
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5answers
2k views

Do primary and secondary coil resistances correspond to number of windings?

An inductive ignition coil is basically a step up transformer, in which the ratio of windings between the primary coil and secondary coil determines how much the primary voltage is multiplied by. I ...
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2answers
4k views

Removing a car battery - order of wires explanation

Q1: When one removes a car battery, why does one start with the minus wire? Is it because if we remove the plus wire first it may touch the body of the car and close the circuit, causing a short-...
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5answers
25k views

How does a lightbulb with two filaments know which one to light up?

I need to replace the taillight/brake light on my car, and it's a bulb with two filaments (known as 12V P21/5W - see pic) My car has two taillights on each side. A standard 5W bulb for the top half, ...
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3answers
1k views

Can stock headlight wiring deal with 110 W bulbs?

My 2003 Opel Agila has 0.85 mm2 wiring for the entire headlamp circuits. I want to install higher wattage bulbs, up to 110 W. It takes H4 bulbs so the high and low beams are combined into ...
7
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2answers
827 views

Are there any modern diesel engines that require electricity to continue running?

I was reading this question about an owner checking the alternator by disconnecting the battery, which is an easy way to validate on a gasoline engine. The single answer assumes that the OP is ...
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3answers
207 views

What are some typical maintenance things that every owner should do regularily?

Right now I just get a car wash every month, and my oil changed and whatever is included in that. Usually just a quick "inspection". Is there anything else I should be doing for my car? Or also, is ...
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2answers
584 views

Time Delay Relay and Flyback Diode

I want to control an auxiliary fan on my 1969 Mercedes which is currently wired to run until the temperature drops below the sensor level. Sometimes this takes quite a long time even after the car has ...
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2answers
2k views

Can I avoid buying a ridiculously expensive replacement starter motor?

My situation can be described with a photo: That's my starter motor, which doesn't appear to be in a healthy condition. What I would like to know is, can I avoid spending over $500 on a new one in ...
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2answers
2k views

My mazda milenia wont rev past 2500 rpm

So I just recently bought a 2000 Mazda Milenia s Millennium edition,and on my first day out with it, I experienced a very unusual problem. After about 20 minutes of driving the car wouldn't rev past ...
7
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3answers
131k views

Low beam headlights don't work, High beam headlights do

The vehicle is a 2003 Chevrolet Trailblazer. The low beams aren't working. High beams are. The fuse is perfectly fine (tested and swapped out). The bulbs are fine too. A mechanic told me it could be ...
7
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1answer
1k views

No power to my 1988 LS650 Suzuki with new charged battery

I have a 1988 Suzuki LS650 Savage from someone who jumped it off with running car. Put a new battery in it and now I can't get any power. No lights or anything. What do I need to check?
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5answers
36k views

Can hooking up jumper cables incorrectly damage the electrical system of the receiving vehicle?

Our Jeep was having problems turning over, so we called a tow truck driver. He connected the jumper cables incorrectly, starting a small fire on the battery box. After the fire was out, the Jeep no ...
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2answers
12k views

Can an engine stop from a bad battery?

The car is a 2005 Toyota Corolla CE. Its engine is the 1ZZ-FE, a 1.8L straight four that runs on gas, not diesel. The alternator is stock, and tests out just fine on the multimeter in both voltage ...
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2answers
5k views

Suzuki GSXR600 (K7) - Burned regulator/rectifier

I have managed to completely fry the regulator/rectifier on my Suzuki GSXR600 (K7). I suspect that it happened when I blindly splashed into a big water pond, some water probably got on the connector....
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2answers
519 views

Does coil rewinding have a negative impact with the existing system?

I have a question towards the rewinding of a coil. Here is the tech spec of the bike:- Battery : 9 Ah, 12 V Generator : 12V, 100 W Fuse: 12V 10A My bike comes with an electrical spec of DC (...
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4answers
5k views

Are there any (legal) ways to increase halogen headlight brightness?

My 2003 Opel Agila has H4 combined full and dipped beam headlight bulbs which are completely useless in the dark. It is really hard to see anything on the dipped beam. They do not seem to be very ...
7
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4answers
8k views

Should only the left “Rear Fog Light” actually light up in a pair?

On a 2003 Saab 9-5 Aero, only the left rear fog light lights up. The right side has a bulb but when I switch the bulbs, the left still is the only side that lights up. I thought it might be a wiring ...
7
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4answers
15k views

2007 Nissan Armada power window fuse location

According to the fuse block diagram, there is not a dedicated fuse for the power windows. Anyone know if the power windows are on another fuse? Front drivers side window will not go down and switch ...
7
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2answers
110 views

Why do dealers want their technicians to use True RMS multi meters?

Dealers, particularly for General Motors want their technicians to use True RMS multi meters such as the FLUKE 87V. There are other meters made by FLUKE such as the 88V, which is an "Automotive ...
7
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3answers
644 views

unique alternator issue

I have a 2006 Jeep Wrangler with a stock alternator. I just built a off road teardrop trailer with its own 12v AGM battery and 12v refrigerator --the Jeep battery is an Optima. Using solenoids, I ...
7
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1answer
19k views

Car battery dead for a while… now it won't charge?

So, my car battery died 4 months ago while it was unused in my garage during the summer (interior dome light left on for months). I went to jump start it this morning, ran it 20km ( 30 minutes ) to ...
7
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1answer
1k views

Headlight and dome light flickers

My car's headlight and dome light flickers when the car is started, but when the car is already moving light is working fine. Other lights works fine, though I wasn't able to check the tail lights and ...
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3answers
508 views

Head light bulbs

There are lots of head light bulbs manufacturers and types, but I've seen some claim to be able to provide 50% more light. Well, if the voltage that gets to the light bulb is always the same, for more ...
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1answer
2k views

Does a constant blown fuse always indicate a short?

My wife was driving our 96 Ford Windstar recently and she said right after she hit a bump in the road the ac stopped working and the instrument panel lights went out. I found the fuse from the wiring ...
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3answers
716 views

Battery and Alternator Pass Test - 2003 Mustang GT

I have a 2003 Ford Mustang GT, I had the battery tested and it will take a jump and start up so naturally I am thinking the alternator is bad. I take the alternator out and have it tested 3 times and ...
7
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1answer
332 views

Can I Mount auxiliary lights for Hero Honda Passion 2002 bike?

I am having a Hero Honda Passion 2002 model bike. The head light is very low and it works on engine power not on the battery, due to this riding bike in no light area with lots of ups and downs are ...
7
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1answer
10k views

How can I diagnose gradual electric power loss in a VW Golf Mk5?

I'm experiencing loss of electrical power to my Mk5 Golf. It seems to happen mostly when the car hasn't been run for two or three days. We changed the battery a few months ago. More recently, there ...
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2answers
1k views

How to detect a failing car alternator..?

Is there some way we can predict that the car alternator is about to fail in order to avoid a discharged battery situation on the road.. Although it will slow the sound of horn and will dim the ...
7
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3answers
2k views

Hyundai Getz - A/C (interior) blower doesn't turn off

Problem solved: It was a bad ignition switch. I replaced the switch and everything works fine. Seems like the root cause was moisture + this horrendous solder job. Has anyone come across something ...
7
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2answers
130 views

Semi-permanent power inverter

I'd like to install a semi-permanent 500 watt inverter connected to the car battery for greater power delivery. The battery is in the passenger area, so there's no need to run wiring through the ...
7
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4answers
8k views

Alternative reverse light switch

I am about to take me ute to get a "safety" certificate so that I can get it registered (QLD, Australia) and I have one issue left that is still a possible problem. The switch that operates the ...
7
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2answers
15k views

Could less than optimal battery charge prevent starter bendix drive from engaging flywheel?

With a less than optimal 12.2 volts at the battery terminals and the bendix drive at the starter failing to pop and engage the flywheel, would battery charge be a likely cause of such a failure? Or ...
7
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2answers
13k views

Manual horn switch

what are the pitfalls or things to look out for when manually wiring a switch from the battery to the horn? Some background: I just moved to texas where they require vehicle inspections. My horn ...
7
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1answer
2k views

Won't Start, No Crank, Lights Inside Work, Key Issue, Electric?

Details Chevy Malibu 09 Low on coolant (still visible in the tank so not entirely out) Belts are fine-Never overheated. Timeline One day it didn't start (don't remember it cranking) but then it ...
7
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1answer
450 views

Starting a diesel tractor

I have a diesel tractor with a generator. After sitting for a long period the battery was low so I used a portable jumper battery but mistakenly hooked up the cables in reverse. This caused smoke to ...
7
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3answers
40k views

Car Won't Start After Disconnecting and Reconnecting Ground Cable

I wanted to reset my check engine light to see if a problem I think I fixed resurfaces, so I disconnected my negative lead from the post. When I reconnected the lead the car refused to start. ...
7
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1answer
1k views

Alternator isn't charging battery properly. Replace or swap regulator only?

I have a 2015 Honda Fit EX. On my dashboard, there is a small screen that has been displaying "CHECK CHARGE SYSTEM" and displaying warning lights (TPMS, power steering, and stability control). I ...
7
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1answer
4k views

backup lights stay on in park and switch off

I am working on a 2003 ford explorer sport trac.The backup lights stay on and I have to remove the fuse to turn them off.
7
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1answer
726 views

Low beam not working in headlight

I have a 1999 Miata, i bought the car for 750$ as a project car. it had some body damage but i figured i would fix it. The car is mostly done now, but i have one major issue. The low beams in my ...
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6answers
25k views

Chronic ignition problems with 1996 Suburban, replacing distributor cap makes it go away

I'm trying to diagnose an ongoing ignition problem with a 1996 Chevy Suburban. Sometimes it won't start, and the previous owner said this happens regularly, and every time the problem occurred, ...
7
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2answers
148 views

Can't Start '08 Civic (Diagnosis)

I bought an '08 Honda Civic LX (110k miles). After a few days of flawless driving, I noticed a couple wires NOT connected that were coming from the hood opener-sensor thing. I plugged them together ...
7
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1answer
396 views

Discharging alternators

I had to replace the original alternator on my '99 Z28 Camaro in January and have had 3 after market and 1 OE and all continue to discharge with air and radio on. Mechanic says it is fine but I think ...
7
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1answer
522 views

Problem with wipers on 1993 Ford F150 302 v8 5.0 liter

I had a problem with my wipers. The motor was junk, so I replace the motor. I bolted it back on, plugged it back in, and it still doesn't work. I unplugged it and pushed the button for the wipers and ...
7
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1answer
501 views

Diode selection or “Engine Running Only” electrical source on 1965 Mustang?

I am working with a 1965 mustang and have added heated seats. The seat heater wiring does not have a latching circuit and is controlled by a SPDT Hi/off/Low switch. In an effort to only allow the ...