3 of 5 of my dash board bulbs quit working, the gauges work but the bulbs do not. I've replaced the bulbs but they are not the problem. I used a test light on the sockets and they are all fine, it's just the bulbs quit working in those 3 gauges. Any ideas?
Technical Dash lights quit working
- Thread starter MReynolds
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Technical Dash lights quit working
ZaphodB
Member
Which year ?
Which bulbs ?
Which bulbs ?
it's an 82 Fiat Spider, the bulbs are for the fuel, speedometer and temperature gauges.
ZaphodB
Member
I'm pretty sure I've found the correct circuit diagram....
From page 6:
What I see:
12volts comes from the fusebox, to connector C28 and (Red/white cabling) feeds all the dash instruments (fuel, speedo, clock, water temp, tacho)
All the corresponding 0volts are tied together with a white/black cabling
So to have random instruments lighting fail indicates to me poor connection in connector C23, C25 and C26
So you need to get a multimeter to check 12v and 0v on the various connectors of each instrument (Use the car chassis as your ground reference) ... if you find 12v where it should be a 0v that tells me the 0v isn't actually getting grounded properly.
FYI: The little circles with a cross inside them are the instrument bulbs (it's a universal bulb symbol)
From page 6:
What I see:
12volts comes from the fusebox, to connector C28 and (Red/white cabling) feeds all the dash instruments (fuel, speedo, clock, water temp, tacho)
All the corresponding 0volts are tied together with a white/black cabling
So to have random instruments lighting fail indicates to me poor connection in connector C23, C25 and C26
So you need to get a multimeter to check 12v and 0v on the various connectors of each instrument (Use the car chassis as your ground reference) ... if you find 12v where it should be a 0v that tells me the 0v isn't actually getting grounded properly.
FYI: The little circles with a cross inside them are the instrument bulbs (it's a universal bulb symbol)
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