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Old 09-16-2012, 04:57 PM   #1
nmnkpjz
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95 swapped impreza
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Default Please Help Tail Lights Dont Work Keep Blowing Fuse

hello all I have a 95 impreza L with a full wrx swap dash motor trans suspension wiring harness etc etc and i have been having problems with the tail lights and side marker lights not working and blowing the tail clearance fuse under the dash along with the dash illumination fuse in the engine bay (illumination fuse doesnt always blow). I have checked all the wires in the tail lights where the previous owner spliced the impreza tail light plugs to the wrx harness and everything was soldered and looked to be done professionally. Today i was trying to source the issue out when my father noticed there was smoke coming from the parking light switch above the steering wheel so he immediately turned the key off and we took apart the steering column and i noticed the wiring from the parking light switch to the connecter plug was a little roasted i unplugged the plug for the switch and the taillights did not work and i did not see any issues in the wire the looked like it was grounding out.
With that said my questions are,
Has anybody had this similar issue ?

Does the plug for the parking light switch need to be plugged in for the tail lights to work?

Does anyone have a wiring diagram so i might be able to source where those three wires go to so i might be able to find a torn section of wire?

Please any help would be greatly appreciated this is my daily and need to figure this out asap thank you
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Old 09-16-2012, 06:15 PM   #2
Cougar4
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The switch does indeed supply power to the lights even though it may not be turned on. So it has to be in place for the lights to work. When the switch is turned on it bypasses the tail light relay circuit but still supplies power. I doubt there was a problem with the switch itself. I would suspect there was, or is, a low resistance to ground somewhere after the switch that caused it to smoke. Check the resistance to ground on the wires that switch ties to. See if you find one that is almost shorted. Find the power wire to the switch first an ignore that one.
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Old 09-17-2012, 06:48 PM   #3
nmnkpjz
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thank you for the help im going to be heading to the car tomorrow im gunna check the wires tied to the switch tomorrow and i will post any results thank you again hopefully i can figure this out
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Old 09-17-2012, 08:13 PM   #4
Cougar4
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You're welcome for the help.

After looking at some data for another model the wire color going to the lights might be red/black. I'm not sure if that will match your car also.
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Old 09-17-2012, 09:40 PM   #5
nmnkpjz
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okay cool im pretty sure the entire column is from the 04 wrx donor car as there wasnt much left on the car that was 95 beside the body and obvious parts lol but i will know tomorrow hopefully
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Old 09-17-2012, 09:44 PM   #6
nmnkpjz
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And also you wouldnt happen to have any idea if that parking light switch runs to the fuse box under the dash or to the engine bay if we were looking at an 04 wrx .. so i have an idea if the problem is further down the wires so maybe if i can figure out where those wires end at i can check both ends and work my way in one i find the damaged wire
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Old 09-18-2012, 05:05 PM   #7
Cougar4
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The info I have on an 02 model shows that power for the lights while the switch is in the off position comes from the tail light relay located in the dash fuse panel on a blk/red wire and ties to an orange wire through the switch, then to fuse 5 in the dash panel, and then on to the lights. If there is a shorting problem then fuse 5 should have blown if the trouble is after the fuse. Use a ohmmeter to see if there is a short to ground on the orange wire going to the switch. If there is then remove fuse 5 and see if the short is still there. If it is then the short is between the meter and the fuse and not to the lights and explain why a fuse didn't blow. If there is a problem after the fuse then check the bulb sockets. I have seen a short inside the socket due to burned insulation. There are other possibilities also. If you have a trailer harness check that out. It is also possible the switch just had bad switch contacts that made a resistive connection and that caused the trouble.
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Old 09-18-2012, 08:23 PM   #8
nmnkpjz
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i didnt get to work on the car today due to the horrible whether but i do remember seeing the orange wire from the switch and it does blow the #5 fuse almost every single time i turn the lights on so then hopefully the problem will lie in the wires between the fuse and the switch
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Old 09-18-2012, 08:46 PM   #9
Cougar4
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Well if the fuse is blowing out then that means the high current IS passing through the fuse and blowing out, so the trouble is AFTER the fuse and not before it. Use a ohmmeter to monitor the resistance to ground on the protected side of the fuse contact. Disconnect the rear lights until you see the resistance go significantly higher, this meaning you removed the connection to the short. Then trace that area of the wiring using the same method until you find the trouble.
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