For questions about the wiring of a car(apparatus that connects electrical circuits).

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1
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1answer
188 views

Two 12 volt power sources into one device

How can I power one 12 volt outlet (feeding a XM radio transformer) from two separate 12 volt sources on a RV (ignition and coach power). Is it feasible to use 2 diodes?
2
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0answers
40 views

Need help installing Pioneer car stereo in 2006 Hyundai Sonata (power antenna)

I have a 2006 Hyundai Sonata and am switching over my brand new radio from my old car. The radio I have is a Pioneer AVH-2800BS. According to Crutchfield (which I know and trust by heart!), it says "...
3
votes
1answer
19 views

Need to repair connector for the Temp Sending connector on my Buick Nailhead engine

I'm starting to work through the things that need doing on my 1965 Buick Wildcat. At one time in the past, one or more rodents chewed through the wires on my Temperature Sending Unit. I've replaced ...
7
votes
0answers
27 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 ...
3
votes
1answer
21 views

Electrical reverse lights stay on

We recently purchased a restored 1971 chevelle ss. They did an excellent job. I just noticed that the reverse lights are always on and assume it something with the switch. Where might I look for the ...
4
votes
1answer
16 views

Having trouble finding socket and wiring harness for xb 2005 left blinker

So I recently ordered new headlights from O'reilly, and when I received them the blinker sockets did not come with them. I think I found the socket, but all the plugins I come across are for the main ...
8
votes
4answers
3k views

How to amplify car speakers without stereo?

I have a 1980 VW Dasher with its original speakers but no radio. It has an unusual (erroneous?) electrical configuration where most accessories (e.g. lights, cabin fan, etc) still run even with the ...
4
votes
1answer
89 views

What is the best way to repair these motorbike wires?

2 of the wires on my motorbike were cut and used to hotwire it. It's been recovered and I need to permanently connect these back together. What would be the best and easiest way to do this? An ...
6
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1answer
10k views

VW Mk4 Golf/GTI airbag indicator warning light

My 2002 VW GTI MkIV recently had the airbag warning indicator light turn on. The VW dealership wanted to charge around $600 to fix it. They told me the seatbelt latch was at fault because it had an ...
4
votes
1answer
665 views

How to hack an on-demand rear diff locker on FJ Cruiser bypassing the ECU?

The Electronic Control Unit on my FJ Cruiser is not relaying the signal properly to the rear differential lock actuator when I switch it on. I want to bypass the ECU altogether and make the switch ...
4
votes
1answer
63 views

2006 Fusion, unplugged blue plug behind glovebox, now one headlamp and brakelight not working

06 Fusion SE 2.3L. AC wasn't working so I took advice from this instructables article and this video to do a quick temporary fix. I attached a 47kOhm resistor to the purple and yellow wires (top 4th &...
5
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4answers
101 views

Modding Honda Ridgeline cigarette lighter to power USB ports

I am doing a project in my '06 Ridgeline where I am taking out the iPod / Aux add-on and putting in a Bluetooth / Aux add-on at the back of the radio. In the process I will be removing the left ...
3
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0answers
27 views

Getting Wiring Harness through Radiator Support?

I'm currently in the process of doing my best to overhaul an 88 Chevy Silverado Pickup 2500 V8 5.7L. I do not know much about cars, but am learning. Anyway, long story short, the engine hoist I have (...
12
votes
1answer
11k views

Do I have to rely on wire color to correctly wire up an O2 sensor?

It seems that everyone and their grandmother has a different color-code convention for 4-wire O2 sensors, which complicates matters when one is trying to wire up a replacement "universal" O2 sensor. ...
4
votes
1answer
62 views

Re-wiring Harness in Jet Boat w/ Ford 460

I'm replacing the wiring harness on my jet boat. It has a Ford 460 in it. The boat has five gauges on it. A tachometer, oil pressure, amperage, fuel gauge, and water temp. There is also a toggle ...
6
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0answers
54 views

VW Transporter T5 - p1503 Generator Terminal DF (Load signal) Signal Improbable

I have a VW Transporter T5 2007 with 2.5 TDi BNZ engine. I have the following fault code (among many): p1503 Generator Terminal DF (Load signal) Signal Improbable. This fault code gets repeated ...
8
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5answers
33k views

Is it necessary to have two ground wires (1 to engine and 1 to car-frame)?

My jeep's stock wiring has two ground cabled coming from the negative terminal. I recently upgraded all of my positive cables, and now I'm on to the negative. Is it necessary to have one cable going ...
6
votes
1answer
95 views

Where can I find a power adapter to run a car stereo from a wall outlet?

I have a car stereo head unit that I'd like to repurpose as a radio for my garage. Given that, I'm looking for some kind of power adapter / transformer that I can plug into a wall outlet and splice ...
10
votes
1answer
278 views

Motorcycle Headlight Conversion

I've decided to install a new headlight on my bike. The current setup is two bulbs, one is on for low beam and both on for high beam, with two wires going out of each (h11?). Here is a short video of ...
4
votes
0answers
184 views

How to wire an ignition switch for boat throttle controller

I have an old Bass Tracker boat. They no longer make the throttle controller for the boat, but I need to replace the ignition switch (which is in the throttle controller). I looked online and this ...
5
votes
1answer
37 views

Replacement: How do I determine what wiring harness goes with my headlight?

I have a 2005 scion xB and am needing to replace the headlights and one of the wiring harnesses. I have seen on places like amazon and other sites for OE head lights, but I cannot seem to find ...
3
votes
1answer
28 views

Dodge w150 318 727 torqueflite; need help with wiring

We just got done putting motor back in but a ground wire from the head to the fire wall keeps getting hot and smoking (steel braided wire) we've been all over this thing and cant find out our problem
6
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2answers
94 views

Is there something that can be applied to electrical connections to prevent rust and corrosion?

Another recent question got me thinking about this. Will a ground to the frame work properly if the bolt is powder-coated? Since I don't have any skill, tools, or ability to powder coat, whats the ...
16
votes
5answers
77k views

What causes battery terminal corrosion?

I put a new battery in my car about 8 months ago. After a problem starting a couple days ago, I found that there was massive corrosion under the battery terminals, so I cleaned them out and ...
2
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2answers
435 views

What are the methods to improve headlights of a car?

I'd like to improve the headlight illumination on my Toyota Carina AT 150. It is equipped with square type 55W lamps, but it's difficult to drive in the city or rainy/misty conditions. What are my ...
5
votes
1answer
59 views

Replacing a very old radio by a slightly less old one

I have an old Daewoo car (from 1995) with a non working stock radio unit (a Philips DC508D). I got a "slightly less old" Pioneer DEH-2000R (from 1998) as a replacement. None of them has any kind of ...
8
votes
1answer
91 views

Testing specific wires in harness cable

I want to do some electrical mods like adding a push/pull switch to my truck' tailgate to wire into my door ajar light to let me know if it is open along with splicing an electrical tailgate lock into ...
4
votes
1answer
60 views

How to diagnose undervolt in electrical system

I have a 1980 VW Dasher. Most of the electric systems perform noticeably weakly, e.g. the A/C fan, interior lamp, dash panel backlighting, windshield wipers, and headlamps. These symptoms have been ...
3
votes
3answers
1k views

2003 Ram 1500 4.7 Misfiring Cylinder 3

Would a bad fuel injector cause plug not to fire? Weird voltages at harness for cylinder 3 compared to other cylinders. No spark at plug. Coil and plug new and tested on other cylinders. I am leaning ...
6
votes
1answer
142 views

Why do cars still use mechanical blinker relays?

I think the electronic relays may be cheaper; and having less moving parts they are theoretically less prone to break. So, why do cars still use mechanical relays for turning lights?
8
votes
1answer
189 views

Disconnected wires near battery in BMW e46

I noticed a disconnected wire dangling next to the battery in the trunk of my 2005 BMW 330ci. It was actually a red and blue wire that veered off from the thick red one in the middle of the image. ...
4
votes
3answers
165 views

Mini Cooper 2003 - Identify rear indicator light wiring to install LED resistor

So off the back of a previous question, I need to install a resister to my cluster in order for the LEDs in the indicators to work properly and not hyper flash. Here is an image of the wiring that I ...
4
votes
1answer
115 views

HuiFei Android HeadUp Unit not shutting down completely, ACC and CONST wires mixed up?

I Bought No brand Android head up unit from ebay (Hong Kong) here is a link to the unit Generic android 4.4.4 car stereo My car is Volkswagen Golf VI 2010 The problem is that when I turn the car off ...
2
votes
3answers
6k views

Radio Wiring diagrams and/or color codes?

I've got an older Nissan truck (1994) that did NOT come with a factory radio. A previous owner had an aftermarket style radio installed, and the installers used one of these universal radio ...
3
votes
1answer
39 views

Gem Harness - MAZDA 2 1.6 2011

Can someone please explain to me what is Gem Harness? Is it something to do with wiring? Searched the net but could not find any convincing answer anywhere. The primary reason I am asking is because ...
10
votes
1answer
190 views

How do I make all of this work together?

I have a friend with 1988 Jeep YJ. I'm not sure if this question is more appropriate for here or for Electrical Engineering. We want to mount this blender with an AC motor in it. I think it's 110 ...
10
votes
1answer
231 views

Are there downsides to making an accessory socket always live, if accessories are removed when not in use?

In some cars, the power line from the battery to the accessory outlet (aka cigarette lighter socket) is always live. In others, it's off until ignition. It seems pretty much random which cars are ...
2
votes
2answers
104 views

No sound to single speaker, even after replacing the speaker

I have a 2005 Chevy Aveo, and the front passenger speaker has no sound. I was able to find a replacement, and swapped out the original speaker for the spare. Unfortunately, this did not help. I know ...
3
votes
1answer
170 views

Wiring Harness / Fuse Panel Repair

I have a 2006 Dodge Magnum and a friend of mine was changing the starter. Forgot to unhook the battery. And when the hot wire on starter grounded out it Melted the Negative battery cable until it ...
4
votes
1answer
702 views

2014 Ford Fusion Front Speaker Replacement (Wiring Question)

I'm replacing the front door speakers in my 2014 Ford Fusion, it is the 6 speaker system(NO 8" LCD or Premium Sony Package). I'm looking at the factory wiring harness and it consists of 4 wires going ...
2
votes
0answers
39 views

Fresh battery, no lights on 1979 Honda CB125 [closed]

I have a 1979 Honda CB125 that was running consistently about 2 years ago. It then sat for two years and the battery was corroded so I replaced it. I've made sure the battery is charged (I have a ...
1
vote
0answers
44 views

12 v RV solar system ground wire size for minmum voltage drop [closed]

I have been too ignorant about wire sizing but now trying to correct it. 280w of panels - 15amp potential max. power for the two - controller (set to 14.4 now) - 12v AGM 200 amp/hr battery. 22 ft new ...
2
votes
1answer
1k views

Two cable connectors under each car seat - what are they for?

I know that one of them is for AirBag (probably the thick yellow one), but what is the other one? Car is Chevrolet Aveo 2007. As can be seen on driver's side there is: thick yellow cable (update - ...
3
votes
2answers
7k views

Should I connect the “power antenna” wire to the “auto antenna” wire?

I have a new radio (Clarion cx501) for my 2005 Mazda 3. I bought a special wiring harness to make the installation easier. I have two wires that I'm not sure if I must connect. They look like the same ...
2
votes
2answers
2k views

Mercedes ML 430 will not start. No click, no electrical lights nothing.

After taking a nap in the parking lot at my job, the driver's seat (power seating) -- the passenger seat did work-- I had laid back could not be readjusted. After work I went home (3am closing shift). ...
2
votes
1answer
321 views

Saturn SL1 1998 Wiring Diagram

I'm in search of wiring diagram of Saturn SL1 1998. My car does not fire-up anymore, and everything indicate that the interlock has stopped working which stop my car from starting. I want to remove ...
4
votes
0answers
29 views

Hiace 1996 ignition/motor problems

I have a 1996 Hiace. I was driving and it just died, nothing. Dash lights all work, but motor will not turn over, nothing from starter. It has dual fuel, and was wondering if it could be the AEB 552 ...
4
votes
1answer
65 views

Utility trailer lights issue

My small utility trailer has sit here for more than a year. Now I found its lights don't work anymore. I used my multimeter to test the four wire harness and find the following: Connect any other ...
3
votes
1answer
113 views

Cracked & frayed wire everywhere!

I have an 84 Ranger with a 2.8L V6. This car seems to have a fair amount of electrical issues, but mostly really minor. I noticed that A LOT of the wiring harness is cracked or frayed, just because ...
5
votes
1answer
94 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 ...