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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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5
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1answer
1k views

97 Jeep Cherokee check gauges light came on and then my battery gauge dropped down to 9 didn't lose any power?

I'm so confused I had just left my house and got 3 blocks away and my check gauges light came on, then my battery gauge dropped down to 9v. My Jeep didn't lose power, and the radio, heat, lights and ...
5
votes
3answers
16k views

Mercedes C250- Eco mode not working

i have a C250, W204, 2011 model, and i noticed that the ECO mode is not working anymore. When i turn the car on, the ECO button light is green and the ECO sign appears in the cluster. After 1-2 min, ...
5
votes
2answers
256 views

If I were to convert a gas powered automobile to an electric car, would a difference in specs possibly damage the car?

I would like to convert a Mazda Miata into an electric car, I plan to remove the engine and the gearbox, and have the car be a direct drive. The motor I intend to use has twice the torque of a ...
5
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3answers
1k views

93 Nissan Sentra SE-R, replaced alternator voltage still low

My car died while I was driving it, but I can put the battery on a charger (or from another car, with jumper cables) and get it running albeit for a short period of time. I put a multimeter on the ...
5
votes
1answer
29k views

Will a BCM prevent a car from starting?

I've been dealing with an issue for over a year wherein my 2005 Pontiac Grand Prix starts sometimes and does not start at other times. I had the issue diagnosed last year by the GM dealership. They ...
5
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2answers
217 views

Intermittent stall at idle

I have a 98 Saturn sw2 with a recent problem. Two times now it has stalled while idling and when it doesn't stall it floats near 500 rpms (Usually 750 - 950). The first time, it would start and just ...
5
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2answers
52 views

Replaced battery… However

We have a 2000 Jeep Grand Cherokee. Finding out our battery needed to be replaced, we got another one. The car started and ran fine for a few days. The next time I went to start it, it clicked over ...
5
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1answer
588 views

Will an AGM/SLA battery still be at risk of overcharge even if its control voltage exceeds the alternator's regulated voltage?

Details: I have a 2001 Nissan Xterra SE I want to install a house battery into the vehicle. The battery I have been considering is the Universal Battery UB12750. Because this is an AGM battery, and ...
5
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1answer
1k views

Is it possible that fuel consumption increases after changing an alternator?

I had a fault with my alternator and I went to the workshop where they tested one alternator and it didn't work probably. That engine was shaking and sparking. But then they tried another one and it ...
5
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1answer
877 views

Trailer socket problems

I have a tow bar and a seven pin plug to operate the lights, fitted on my car. I recently took my boat for repair and when they brought it out of the workshop they dropped it from a forklift truck ...
5
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1answer
406 views

Ducati Monster S4 electrical problems

I have a 2001 Monster S4. The fuel level sensor hasn't worked since I bought the bike. This is mostly an inconvenience, but as there is no reserve facility it means I need to keep a close eye on my ...
5
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1answer
551 views

Van makes knocking noise, even after it has been off for hours

I have an '05 Sienna. At 7 this morning, it was making a knocking noise when I went to leave for work. It had been off since about 9:30 last night. Clicked unlock on the remote and nothing happened. ...
5
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1answer
513 views

Saturn Headlight Problem

I have a 2001 Saturn SL2 that is having a problem with one of its headlights. When I turn on the headlights, frequently one is not lighting. If I go to the front and give the lens a quick knock, it ...
5
votes
1answer
5k views

Jetta intermittent starting problem

I have a 2007 Jetta with 75k miles on it. What I'm running into is that out-of-the blue, the car will not start. Generally, it turns over, but never starts. One time, it started but shut itself off ...
5
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1answer
2k views

How to troubleshoot a fan that won't work unless it's on it's on the highest setting?

My car fan won't work unless it's on 4 (full power). I have 4 options of power for the fan 1 - 4 but nothing happens on options 1 - 3. I have taken the panel off and cleaned all the contacts for the ...
5
votes
1answer
568 views

What's the reason for a battery light coming on and becoming brighter as the engine revs higher?

The vehicle is a 1993 LandRover Discovery 3.5 V8. Today when I hopped in to drive home the battery light came on when I started up, and remained on. It gets brighter as the engine revs and just ...
5
votes
1answer
827 views

Hour meter stopped turning

I have an hour meter for my engine in the middle of my tachometer. It has stopped incrementing when the engine is on. I pulled the tach (which works fine) and all of the four wires that attach to it ...
5
votes
2answers
1k views

Trailer wiring corrosion

Every couple of years I find that the trailer wiring connector (7 pin) on the back of my truck doesn't work properly, causing the brake or turn signals on the trailer to not function. This is caused ...
5
votes
1answer
326 views

Slight delay in power after rectifier regulator blew

I bought an old Honda Fireblade CBR900 RRX a few years back and it's blown the rectifier/regulator a few times. After a recent investigation I discovered that where it was housed was way too hot (the ...
5
votes
4answers
136 views

LED Blinkers - Burning out on 1976 Triumph Bonneville

I have a 1976 Triumph Bonneville and recently replaced the garbage LED chips inside the eBay signal lights with brighter Cree LED chips. I bench tested the circuit shown below with a 12v bench supply ...
5
votes
1answer
191 views

I hate thieves - Ideas on DIY deterrents

My girlfriends car, along with another one in the same parking lot were broken into last night. They took her radio surprisingly without damaging the dash. From the neighbor's car they stole ID's and ...
5
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4answers
764 views

Ideas for rewiring headlights – convert from halogen with DRL to HID + LED DRL

I need some ideas. My 2009 Ford F150 pickup uses the same wire for daytime running lights (DRL) and "full" headlights. The stock setup was halogen bulbs with full brightness receiving 12 V and the DRL ...
5
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1answer
2k views

Diagnosing fuel pump relay on 2004 Acura TSX

My wife's '04 Acura TSX began having issues starting towards the end of last summer. It would turn over just fine, but took 5-10 seconds to actually start running. The problem was intermittent - some ...
5
votes
1answer
74 views

How should I properly connect a high-current accessory?

I have a 2012 Honda Accord that I would like to install a radio transceiver in. At peak, its current draw is 22A @ 13.8VDC. Generally, the wisdom is that it should be connected directly to the battery ...
5
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2answers
2k views

I hear a click when i go to start my car… But starts up on second attempt

Why is my 2009 chevy malibu doing this click before i start it up?
5
votes
1answer
342 views

Unknown red wiring harness near cooling fan area on a Ford Focus 2004

I have a 2004 Ford Focus SE DOHC. Today, I opened the hood and found an unconnected red wiring harness (shown in the picture, it's the one with a question mark pointed at). I looked around the area ...
5
votes
1answer
2k views

07 Subaru Forester XT Electric window working intermittently

A few days ago my Subaru Forester's driver's window (RHD) developed this habit of not opening when I push the switch, or sometimes I push the switch, then nothing happens for a couple of seconds, then ...
5
votes
2answers
17k views

2006 Pontiac G6, 3.5 V6 - ABS and Traction Control Lights in Pontiac G6

I own a 2006 Pontiac G6, 3.5 V6 with 155,000 miles. I was coming to a gentle stop when the ABS activated, and the brake pedal vibrated as though I lost traction. Before accelerating, both ABS and T/C ...
5
votes
1answer
917 views

Should I replace this stator? (2007, Suzuki, DL1000)

I opened my stator case to inspect what I thought was a bad stator. I discovered the following issues with my magnets: Broken Magnets: Cracked Magnets: Not sure if I need to replace stator (already ...
5
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6answers
16k views

Can an O2 sensor cause faulty spark plugs on driver side only when the spark plugs were just changed?

I took my truck (2006 chevy silverado 5.3l v8) to chevrolet dealership due to the fact that it kept sputtering then dying. The check engine light was on the whole 9 yards. The fuel pump has been ...
5
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1answer
1k views

Honda Prelude: digital fuel and temp gauges dimming and brightening repeatedly

I have noticed an annoying issue on my '94 (4th gen) Honda prelude. The digital petrol and temperature gauges appear very faint when starting the car. After about 5 mins they brighten again, only to ...
5
votes
1answer
273 views

Electric welding on modern car, what to disconnect?

Presently I have a BMW E60 530d which failed it's annual inspection due to corrosion around the rear jacking point (which is near the rear subframe mounting point). Typically ahead of welding (MIG or ...
5
votes
1answer
172 views

What do Rear-End Collision Avoidance System do on Ice?

I read on itworld.com: Companies such as Volvo and Mercedes are working on crash avoidance systems. Radar measures the distance to obstacles ahead of the car, and if one comes too close the system ...
5
votes
1answer
157 views

Electrical Issues — possible alternator

I have a 2006 Chevy Cobalt. Recently, I have have been having issues of an electrical nature possibly tied into the alternator. I had the battery changed out July 2016. Often times when I start the ...
5
votes
1answer
41 views

Idle doesn't hold on 2006 Toyota pick up truck after giving a jump, actually failing to give a jump.

We have a 2006 toyota pick up truck and a 2000 mustang with a dead battery. Cable's have been Properly connected. 1, I can get no current flow, no jump from the toyota, yet it starts the pick up ...
5
votes
1answer
762 views

(UPDATED 8/29) 2006 Hummer H3's radio (Pioneer NEX 4200) turns back on after the car is off

I am having an issue where after my car is off for a while the radio will turn back on and stay on until the battery is drained. I have had a large Chevy dealership along with Best Buy's automotive ...
5
votes
2answers
60 views

04 Mercury Montery stalling while driving

While driving on the highway my van stalled. Once on the side of the road, I tried to restart and no joy. All indicators and lights came on but when I turned the key nothing happened. I jiggled he ...
5
votes
1answer
91 views

1998 VW Beetle - Clutch and Electrical Issues

I have a 98 VW BEETLE. I had to change my clutch all the way from the master cylinder to the clutch pedal. Still have no clutch. Then when I tried to start my car all the lights come on even radio ...
5
votes
1answer
78 views

2002 Hyundai Elantra

I made a down payment to purchase a 2002 Hyundai Elantra and while viewing the car when the battery was disconnected with the car running the car died. Does that mean it's the alternator? Because if I'...
5
votes
1answer
518 views

Dash Lights and Headlight Angle Adjust Stop Working

I have a 99 Nissan Almera on which the horn was replaced a few days ago and I just noticed that the dashboard lights and the headlight angle adjuster are no long working. A more powerful aftermarket ...
5
votes
1answer
4k views

No spark on my new motorcycle

I recently purchased an 81 Suzuki GS450L, my very first bike. I'm not getting a spark. When it dies, it does so silently. No backfire, sputtering, etc. My first thought was that it had aftermarket ...
5
votes
1answer
761 views

Knock sensor ground and dieletric grease

The knock sensor for my 2001 Subaru Outback grounds through the engine block. I've seen various advice about whether to put dielectric grease on the underside (where the grounding takes place). Some ...
5
votes
2answers
12k views

Do I have a bad ignition coil? Measurements inside

I'm troubleshooting what I believe is an engine misfire on my LS1 Chevy and want to rule out if I have bad ignition coils. In order to do this I took out the ignition coils and measured the ...
5
votes
1answer
1k views

Electrical issues: where are the grounds on a 1997 vw golf mk3 tdi

When I have the ignition switched on, if I press the brake pedal, or use the headlights, the foglight gets turned on. I think this is an earthing issues so I have checked the grounds in the two ...
5
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2answers
2k views

1997 Geo Metro dies after driving for a short time. What next in diagnosing culprit

Back Story: I recently took my Geo Metro on a road trip. 2700 miles of road trip. The first 800 mile nothing happened. Then going up a hill it died, dropped from 75 mph to 55 mph then the engine ...
5
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0answers
5k views

Non-zero voltage on camshaft position sensor power wire without main relay. Is there short somewhere?

I have been troubleshooting Camshaft Position Sensor no-start issue in this thread for my 2007 Chevrolet Aveo. Long story short - in one of the answers it was suspected that camshaft position sensor ...
5
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1answer
193 views

1999 Dodge Durango won't start after backwards jump

1999 dodge durango will turn over but not start after a friend put jumper cables on backwards.when i try to start vehicle security light blinks ,flashers and dashboard light blinks for approx a min ...
5
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2answers
2k views

Vauxhall/Opel Astra H How to remove front door electrical connector

The front door electrical connector on the Astra Mk5 H, is a rectangular multiplug. Is there a special technique for pulling it off. Are there clips which must be released first? Any tips ...
5
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0answers
3k views

Ford Fiesta Mk6 Diesel Engine Fault [closed]

Upon acceleration the following lights illuminate once the engine reaches 3000-4000 RPM: A message; "Engine Fault" appears on the dash screen. Once this happens, the engine will no longer rev beyond ...
4
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2answers
52k views

When reconnecting a battery, why connect the positive first? [duplicate]

When reconnecting a battery, why is it recommended to connect the positive lead first, and the negative lead last? What difference does it make if they are connected in the opposite order?