Instrument panel wiring

[project71]

Does any know where I can find a wiring diagram for the back of the instrument panel in the dash of a 71 bronco? i cannot get the temp gauge or volt meter to work. All testing I've done shows the gauges are good. Tried several new sensors but can't get the needle to move. If I ground out the connection like shown in youtube channels, the meter will peg out like it should, test voltage to sensor also good. But when I connect it, no go. ***! Any ideas?

 

[Tiha]

Like this? Or are you looking for more Instrument cluster specific?

 

[project71]

Thanks! I have a '71 so the diagram may be a little different than this '75-'77. Also an instrument cluster specific for a '71 would be nice.

 

[Tiha]

Maybe these will help?

 

[project71]

BINGO! Thank you very much.

 

[Rich adams]

Does any know where I can find a wiring diagram for the back of the instrument panel in the dash of a 71 bronco? i cannot get the temp gauge or volt meter to work. All testing I've done shows the gauges are good. Tried several new sensors but can't get the needle to move. If I ground out the connection like shown in youtube channels, the meter will peg out like it should, test voltage to sensor also good. But when I connect it, no go. ***! Any ideas?

 

[L\Bronco]

Does any know where I can find a wiring diagram for the back of the instrument panel in the dash of a 71 bronco? i cannot get the temp gauge or volt meter to work. All testing I've done shows the gauges are good. Tried several new sensors but can't get the needle to move. If I ground out the connection like shown in youtube channels, the meter will peg out like it should, test voltage to sensor also good. But when I connect it, no go. ***! Any ideas?

Hey project71
If the needle pegs when you ground it, the wiring, gauge and cluster voltage regulator should be good. I have 2 theorys.
1) the senders you are trying are for a warning lamp. (they look the same, but they are open circuit until a very high temp, then they short to ground.)
2) what you are using to seal the threads is insulating the sender from ground preventing operation.
There is a weak 3rd scenario involving a bad block to body ground, (A ground strap from the back of the intake to the firewall.) but that one usually makes the gauges read weird rather than not at all.
Hope that helps.
Cheers!

 

[L\Bronco]

P.S.
when you say volt gauge, do you mean Amp? those rarely worked and they are "shunt" type ammeters, which means the gauge circuitry is in parallel with the alt. output wire. All the charge current runs through the gauge. If it is actually charging, the gauge is bad. If its not charging, it could be the gauge or the wire\alt\fuse link.
Cheers again