Temp Gauge trouble shooting

[bigdawgchallenger]

Any one know a good way to trouble shoot these things?

1989 Z33 454's

[z33donzi]

hey big dawg you going to have that bad boy ready?

[z33donzi]

hey big dawg i sent you a pm iam up call me

[z33donzi]

i have a merc wiring diagram if that help tells what wire where colors etc.

[bigdawgchallenger]

Tom, give me call in the morning. Having phone issues.

Mike
2163150125

[mrfixxall]

Any one know a good way to trouble shoot these things?

1989 Z33 454's


Ground the temp wire,if it pegs the needle then its good and its the sender,make sure you have a good ground to the thermostat housing,,did you use the gasket that has the brass rivets in it ??

[bigdawgchallenger]

Thanks, it was a bad sending unit.