gauge issues/update

[markbob]

Hello All....

I have a 69 Coronet with non ralleye dash.....

I checked voltage limiter function at fuel tank sending unit with a test light.....I get a flashing light....

I checked voltage limiter function at temp sending unit with same light....I get nothing....
I placed a jumper wire from sending unit wire to ground.....temp gauge needle does not move....

I checked all wires behind dash....especially those leading to the round plug in center of instrument cluster....nothing seems amiss....

I checked wiring diagram....and the temp gauge and fuel gauge share feed from voltage limiter....

How is the cluster grounded? Is it through the dash itself? My headlights, instrument cluster lights, emergency flashers all work.
My steering wheel is not installed, so the harness connections to that are not hooked up....

if I place a jumper from the ground to the fuel gauge sending unit wire, and the fuel gauge needle moves, then does this mean I need a new temp gauge?

Any thoughts?

thanks,

Mark

 

[bigmanjbmopar]

I just fixed my temp sending unit this past weekend by replacing it. but it pegged high when grounded so gauge is working have you considered a new circuit board? Loose solder joint? I had a burnt solder trace on mine. also had loose pin on the board as well.

Cluster is grounded by the screws that hold it to the dash make sure no pint is there and they are not stripped, if you have to make a ground strap to the cluster.

 

[markbob]

Guys

ran car today..... What a thrill
sounds great and what do i see.... A working
temp gauge ... I have no idea why its working but i will
take lucky over good anyday!

gas gauge is not indicating yet but i need to fill up tank to b sure

thx for all ur advice

mark

 

[markbob]

Well I spoke too soon

ran car today..... No temp gauge indication
i will fill up gas tank a bit and c if it is a cluster issue
or a gauge issue
since it worked before it must b a bad ground
any thoughts?

Mark

 

[67 coronet]

try wiggling the temp sender conector.sometimes you can get bad contact there,that is of course if your gas guage works.