dandd

dandd

Active Member
Hi
Got an issue with the brake lights and wanted some advice to have a go at fixing myself.

I’ve got a 2a and someone put a Isuzu Diesel engine in. Electrics arnt great to say the least. My main concern is that the brake lights are out. I have replaced the units and bulbs and brake switch as it also has a later defender brake servo fitted.
Still no joy on the brake lights so I’m guessing it’s a wiring fault. I have checked all grounds.

Are any of the wires prone to failing in particular places that I could check?

Really can’t afford to pay a professional

Cheers
 
Multi pin plug connectors are where problems can arise but I'd double check the earth first. Try taking a long length of wire directly from the negative post of the battery to the brake light fitting.

Col
 
Multi plug near where loom goes into chassis leg at drivers foot well. Do you have a tester?
 
dandd said:
Hi
Got an issue with the brake lights and wanted some advice to have a go at fixing myself.

I’ve got a 2a and someone put a Isuzu Diesel engine in. Electrics arnt great to say the least. My main concern is that the brake lights are out. I have replaced the units and bulbs and brake switch as it also has a later defender brake servo fitted.
Still no joy on the brake lights so I’m guessing it’s a wiring fault. I have checked all grounds.

Are any of the wires prone to failing in particular places that I could check?

Really can’t afford to pay a professional

Cheers
Click to expand...
You need to methodically check all of the system. Just because something is new doesn't mean it'll work (especially if its out of a blue box) Test that there is power going to the switch,(if not check the fuse and power going to that). If there is power at the switch, check the switch. Then run a live to the socket and test that with a bulb that definitely works. If all that works check the loom from the switch to the socket as best you can including the connectors (these are famous for corroding internally). If you still can't find the fault your only option may be to run a new wire from the switch to the socket. Not ideal but it will keep you safe and legal.
 
Yep I’ve got a tester have never used it but I’ll get the bigger out the box. Cheers for all the help guys.
I’ll have a go on it today and see what I can do.
The auto electrician wants £300 a day
 
If there's a Toolstation near you get one of these:
https://www.toolstation.com/car-light-tester/p84459
Its also got a point you can poke through the insulation. Connect the two wires on the brake switch together and follow the wires its shoudl all be live. Try with the ign on and off in case its wired that way.
They have free coffee so you could be quids in.
 
If it's the brake switch in the servo bracket then you might as well throwthe Britpart switch away - junk. Try joining the wires to bypass the switch and make a continuous circuit. That at least rules that out the switch and allows you to test other parts without getting someone to press the pedal. Don't forget, ignition needs to be switched on.
 
As above first start at switch, the green wire should be live with ignition on , if not has fuse gone have a look at diagram it should be similar , I find the bullet connnectors hide a lot , but these are cheap on eBay and solders on easliy
80304FFB-ABC3-4582-B818-1E06D593CCF8.png
 
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