John366
Member
- Posts
- 17
- Location
- Bolton, Lancashire
I think I know the answer to this problem but someone may have seen/solved it before so here goes.
I have a 2000 V8 Discovery 2 with about 90k miles on the clock. Generally most things are OK and what you would expect for a Discovery of this age. It recently failed its MOT on steering knuckle ball joint play and failed rear fog lights. I've fixed the steering knuckles. The rear fogs keep blowing fuse 4 in the passenger compartment
I've removed the fog lamp/indicator clusters and disconnected them from the cables. The fuse still blows as soon as the button is pressed. I removed the switch and disconnected it from the connector. I triggered the lights by connecting the blue to black cable pins. The fuse blew instantly. You can still hear the relay in the fuse box clicking as it toggles on and off. I've removed the fuse box and disconnected all the cables. The red and yellow wire to the switch trace is isolated (ie not connected to ground somewhere it shouldn't be). The red and yellow wire that runs to the back of the vehicle is solidly connected to ground somewhere - hence the fuses blowing. Somewhere it is resting against something sharp which has penetrated the insulation and shorted it down to ground. I suspect the solution is to run a new cable and cut out the damaged section but this does not address the risk of the problem extending to adjacent wires. I think the loom for this cable runs in the roof space above the lining before dropping at the back of the vehicle. I've tried disconnecting the tow bar electrics on the offchance that it was that causing the problem. Has anyone experienced this? Can anyone suggest potential points at which the loom passes through or past sharp edges. What I really need is a ferret who knows how to apply insulation tape.
I have a 2000 V8 Discovery 2 with about 90k miles on the clock. Generally most things are OK and what you would expect for a Discovery of this age. It recently failed its MOT on steering knuckle ball joint play and failed rear fog lights. I've fixed the steering knuckles. The rear fogs keep blowing fuse 4 in the passenger compartment
I've removed the fog lamp/indicator clusters and disconnected them from the cables. The fuse still blows as soon as the button is pressed. I removed the switch and disconnected it from the connector. I triggered the lights by connecting the blue to black cable pins. The fuse blew instantly. You can still hear the relay in the fuse box clicking as it toggles on and off. I've removed the fuse box and disconnected all the cables. The red and yellow wire to the switch trace is isolated (ie not connected to ground somewhere it shouldn't be). The red and yellow wire that runs to the back of the vehicle is solidly connected to ground somewhere - hence the fuses blowing. Somewhere it is resting against something sharp which has penetrated the insulation and shorted it down to ground. I suspect the solution is to run a new cable and cut out the damaged section but this does not address the risk of the problem extending to adjacent wires. I think the loom for this cable runs in the roof space above the lining before dropping at the back of the vehicle. I've tried disconnecting the tow bar electrics on the offchance that it was that causing the problem. Has anyone experienced this? Can anyone suggest potential points at which the loom passes through or past sharp edges. What I really need is a ferret who knows how to apply insulation tape.
