HJ75-Dash lights gone?

[turkey]

The dash lights on the Troopy have vanished . Have checked all the fuses etc all good there. All I want to know is there any common faults that would make them just stop before I start pulling the whole dash to bits cause me and wiring are not good mates?

My electrical skills bring the suck, but from what I can see on the wiring diagram there is 4 points relating to "instrument cluster illumination" and they are connected as well to something called a "rheostat switch"? Wtf is that and what does it do? ANY tips or hints here would be bloody marvelous

TIA

[Z()LTAN]

check the plug in the back of the alternator.

the plug has come out or the wires are broken.

Be careful as the alternator is no longer charging the battery now, so get it fixed b4 the battery goes flat.

[75 cruser]

as so check that dimmer adjuster as that has played up on mine some time ago

rob

[turkey]

Well everything else is working fine, all taillights headlights, even the cig lighter light is working - just no dash lights. Have checked the dimmer no difference there, will go check alternator shortly cheers

[crozza]

First thing to do is check wether you have no positive supply or no earth.

So Turn on your dash lights and check for 12vdc Positive on one side of
youre dash light somewhere with a multimeter....ie a plug or bulb holder...Ground the neg lead tfrom youre meter to a known good earth..If you have 12vdc Positive then youve lost youre earth, somewhere common for all bulbs/lights on dash. Check the otherside of the plug / bulb holder for an earth by setting youre meter to continuity and see if you have an earth. It can only be one or the other....

No positive with good fuses is usually a broken wire in a harness. Maybe rubbing on a sharp bend or pinched too tight by a clamp/cable tie..etc
Bear in mind that this is assuming no inline relays or dimmers are in the wiring which may have failed.

No earth can be simply a common earth bus, rail, tie off point, that has come adrift or needs to be reseated due to a bad earth.

Always start from the battery and work youre way along checking for 12vdc Pos as often as possible ie..back of plugs etc..untill youve got youreself all the way to the dash light themselves.

Hope this helps.

[turkey]

Thanks crozza much appreciated! Will try and get hold of a multimeter today or tomorrow and have a crack at what you have suggested on the weekend. I dont have one, but maybe its about time I did buy one me thinks!

Im guessing its going to take a while to track down. I just bought this old bus and everything was working fine till last night , looks like a multimeter is going to be a handy item to try learn how to use properly

[crozza]

Can also be youre instrument cluster assy. Depending on Model of car.

At the back of it , it has a film type PCb assy. Youre bulbs twist into there respective holes and make contact on bare voltage lines embedded in the film. It is possible that this unit is faulty and not letting any voltage across the PCB.

See if you can follow the wiring on it from one of the bulb holes down to a plug somewhere on it. Then chk this plug for power. Would be a quicker way of checking it.

Cheers