Rear light lighting up with side repeater and brake.

24th September 2014, 19:18

Hello there,i got an issue with the passenger side rear light,the rear position brake light does not illuminate on the first click of the indicator stalk but it comes on and flashes when the left side repeater is on and also when you brake,so far i've tried:

Cleaning the bulb holder
Checking all the right rear light wiring,no visual damage
Tried another working bulb holder
Checking all the fuses below the glove box,all working
Checking all the bulbs are in the right position and works
Check the 2 earth in the boot,no visual damage
The battery earths are fine,they are only a few months old due to battery relocation
Checked the 2 little boxes (relays) on the rear quarter panel,no damage and connected tightly

I wasn't able to find the issue anyway,strangely enough when i fitted another bulb holder for a test all the bulbs came on as soon as i turned the ignition on even with the indicator stalk in off position.

Any idea?

Thanks.

25th September 2014, 06:26

If all the bulbs lit up that would sugest the circuit is ground side switched.

25th September 2014, 11:46

Should i be looking for a faulty earth somewhere then?

25th September 2014, 16:53

Yes check the following earths
e1 near battery
e2 base of lh a pillar
e4 engine bay lh front inner wing
e6 engine bay rh front inner wing
e8 rh c pillar
e10 lh c pillar
e11 lh c pillar.
Check the number plate lights
High level brake light
flasher relay.

25th September 2014, 18:50

Had a similair issue on my sierra gt, only that kept blowing the bulbs aswell

In the end I spliced in to the old earths and added some new ones

26th September 2014, 15:17

Solved this,it was an earth on the rear passenger side pillar that was cut.

27th September 2014, 16:47

Quote:

Originally Posted by VeiRoN

Solved this,it was an earth on the rear passenger side pillar that was cut.

Cool