I pulled the instrument 'V' cluster from my dash to repair a loosened temp
gage. The brass rivet that holds the gage frame to the modular assembly
had apparently broken off allowing the gage to sink below the viewing
window.
When I disassembled the module, the gage was completely detached (windings
had come loose from the solder joints). I took the liberty of re-riveting
the frame back onto the module backing plate and re-soldering the tiny
wires back onto the terminals. I took great care to ensure that there were
no shorts.
After reassembling the cluster, the temp gage automatically slumbers over
to the cold side (as expected). When I plug the signal wires in (engine
cold), the gage pegs the other way towards hot. I am pretty sure that the
tiny deflection coils are wired right. Looking from the back side; red
coil is on left and green coil is on right.
My question is as follows:
1.) Can someone verify the correct deflection coil wiring? I hate to burn
out the little sucker!
2.) How does the temp. sensing circuit work? Is there a biased electrical
current that changes along with the increase in temp?
These gages are soooo simple looking that I have become unsure about their
physical nature.
Tom B. '57 Stepside 3200
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