Vehicle & Technical > Discovery
Dash Light Fuse keeps blowing
Evilgoat:
Depends, without looking at the diagram I dont know. Its possible that it switches a feed from the dash, you could POSSIBLY test this by pulling the glow plug realy out/disconnecting it. If its in the return path that will stop it. If its in the feed, wont make a blind bit of difference but you should be able to meter it out.
regardless I think you are going to need the wiring diagrams.
Range Rover Blues:
The ignition light goes to the engine/alternator, the temp guage would just read max if it were shorted out but it's possible the ignition supply is shorting out on a circuit that goes nowhere near the dash itself.
Evilgoat:
--- Quote from: Range Rover Blues on January 24, 2008, 02:17:11 ---The ignition light goes to the engine/alternator, the temp guage would just read max if it were shorted out but it's possible the ignition supply is shorting out on a circuit that goes nowhere near the dash itself.
--- End quote ---
Alternator excitation SHOULD come from the battery lamp, a short there should just jam that on. Again with out the siting diagram I cant be sure of that. The idea is that untill the alternator become self-exciting it draws power through that bulb, hence the reason its on at startup. Not all alternators do this but I would hazard a guess the LR setup is old enough it does. It would also mean your alternator possibly isnt working. Gah I'm gonna go find wirting fiagrams, this is annoying me now :)
Just confirmed that with someone in the know. Short on the supply to the alternator will result in a glowing battery light and nothing comming out of the alternator.
Wiring diagrams on the way...
Mark_Sims:
I had a problem similar to this. Was caused by the wire running to the towbar socket being pulled a little tight and rubbing on the underside of the car. Hit the right bump and it shorted to the body, the fuse went followed by the dash lights (plus the rest on that fuse).
Mark
craigiow:
have looked around the head and no obvious trapped cables there, fuse seems to pop instantly when cold but when warm can last up to five mins of driving, all lights etc work perfectly when fuse is ok , wondered if it was worse when cold could it be glow plug related ?
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