Lamp Wiring
Posted: Tue Jun 24, 2014 9:46 pm
My S3 SE FHC seems to follow the wiring diagram for the S1 & S2 more than the S3.
My headlamps are not lighting but the flashing function does work (they do flash). I cannot find the headlamp relays on the car. The flasher unit and relay are where they normally are - in the left front wing forward of the radiator but I cannot locate the headlamp relays.
Second problem: my turn signals are not working. It's a bear lying on my back under the steering wheel trying to trace cables!
My instrument lamps don't light either. There is voltage at the switch and out to the red/white cable. That cable then disappears under the dash but I can see where it loops to each instrument. Problem is there's a R/W cable with a bullet connector that isn't currently connected to anything at one end. The other end is in a 4-port connector but the only empty port is the one beside it.
The background is a change to negative earth and conversion to an alternator. When that was first done I had headlamps and turn signals but no ignition warning light and no panel lights. I also replaced the pressure activated brake light switch with a push button switch activated by the pedal. That is working. There is an electric fan in front of the radiator and it along with its indicator lamp work as installed. There's an electric fuel pump in the boot and it works too.
Any suggestions as to how I might trace the problems would be welcomed. Apologies for the long-winded post but I'm getting very frustrated. Thanks in advance.
My headlamps are not lighting but the flashing function does work (they do flash). I cannot find the headlamp relays on the car. The flasher unit and relay are where they normally are - in the left front wing forward of the radiator but I cannot locate the headlamp relays.
Second problem: my turn signals are not working. It's a bear lying on my back under the steering wheel trying to trace cables!
My instrument lamps don't light either. There is voltage at the switch and out to the red/white cable. That cable then disappears under the dash but I can see where it loops to each instrument. Problem is there's a R/W cable with a bullet connector that isn't currently connected to anything at one end. The other end is in a 4-port connector but the only empty port is the one beside it.
The background is a change to negative earth and conversion to an alternator. When that was first done I had headlamps and turn signals but no ignition warning light and no panel lights. I also replaced the pressure activated brake light switch with a push button switch activated by the pedal. That is working. There is an electric fan in front of the radiator and it along with its indicator lamp work as installed. There's an electric fuel pump in the boot and it works too.
Any suggestions as to how I might trace the problems would be welcomed. Apologies for the long-winded post but I'm getting very frustrated. Thanks in advance.