Join Date: Mar 2002
Location: Austin, TX, USA
Re: 69 Temp guage
Measure voltage drops if you suspect a bad connection. For example, these points would be of intrest to ensure the connections are good. In all cases, your meter should read near zero volts with the circuit powered up.
1) Sender body to engine block.
2) Engine block to gauge ground
3) Sender signal wire to gauge signal wire.
4) Battery (+) post to gauge power.
Teflon tape should be fine, but it could insulate the ground if the sensor wasn't tightened enough. A simple continuity check between the sensor body and block would tell you if your good or not. Teflon paste as become a popular sealant as well.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI