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light sensor problem

2361 Views 14 Replies 4 Participants Last post by  ICP Sux0rZ!
so on wednesday i put in my new foglamp bulbs, and now my little warning light in my digidash is saying my rear lights are blown, and they aren't, any ideas on how to fix this?
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bump, ok so i did have one light out, and i fixed it, and the sensor is still saying i ahve a rear light out, i took all the lights out of the housings, and tested them and i ahve no blown lights, is my sensor dead?
I believe you just answered your own question.
sensors dead?
You must have preempted voltage from a source the rear light sensor used to determine bulb functionality. Undo what you did and the problem may be fixed. ;)
all i did was replace a burnt out bulb with the correct size and voltage replacement
SanMarcosZfreak said:
all i did was replace a burnt out bulb with the correct size and voltage replacement
No, when you installed your fog lights. Something happened when you replaced those. Maybe knocked something loose or caused a ground fault.
no i cleaned all the connectors, i actaully reconnected a disconnected ground wire. i think its something completly seperate, i think its jsut a concidence
SanMarcosZfreak said:
no i cleaned all the connectors, i actaully reconnected a disconnected ground wire. i think its something completly seperate, i think its jsut a concidence
I suppose. However, when you've been working on cars as long as I have, you began to realize there's no such thing as a coincidence...... ;)
i seriously think its just a coincidence, all the bulbs are OEM factory specs
i found out what the problem is, i installed LED bulbs and the sensor doesnt like them, so i jacked some 1157's from a 240sx we ahve at class that we use for parts, any idea on how to make the sensor liek them, or could i use the silverstar 1157's
SanMarcosZfreak said:
i found out what the problem is, i installed LED bulbs and the sensor doesnt like them, so i jacked some 1157's from a 240sx we ahve at class that we use for parts, any idea on how to make the sensor liek them, or could i use the silverstar 1157's

The LED bulbs aren't going to work..

The sensor works like this

It measures the voltage coming through the bulb. Your LED light bulbs have resistors in that bring the 12VDC down to something around 3-6. It sees the voltage drop. It says you have a light out..
hence why im bypassing teh sensor
SanMarcosZfreak said:
hence why im bypassing teh sensor

good luck....
hehe i figured out a rather simple shortcut to bypass the sensor.....ignore it by cutting the wire that goes to the idiot light...lol the sensor can scream at me all it wants...i won't hear it lol
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