I replaced the instrument cluster bulbs on my 78 bronco. It seems now that the fuel and temp gauges stopped working. It worked fine before. Is there some kind of ground wire I missed or maybe the circuit board for the panel went bad - all bulbs light ok so somethings work ok. I don't think there's a fuse in the main fuse box for the gauges. How the heck do I troubleshoot this? Thanks!

 

it sounds like you missed something when you put it back together. take it apart and clean all the contacts with electrical contact cleaner. check in the dashboard to make sure nothing is amiss.. carefully re-assemble everything back in.. it sounds like it is a loose connection and usually you can fix it by cleaning everything good..

 

Thanks. I think I found out what it is. When I cross the VOLTAGE STABILIZER on the back of the circiut board the gauges start to work. I thought I might as well order and replace the printed circuit sheet too- just to be safe.