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Re: Temp Gauge or Overheating??
It'd be interesting to observe the resistance of the sender as the engine warms up. Just to get a handle on what's happening with the new sender.
The sender Ohmage is measured from the wire connection terminal to the threaded body of the sensor or the head.
I experimented a bit with a couple squarebody gauge clusters on my electronics bench using calibrated resistance decade boxes and a lab DC power supply.
One of the mid 80's TEMP gauges I tested took 110Ω between the sender and supply ground to drive the needle to 210° or so and 60Ω at to peg the needle at 250°.
If the sender is reading close to 60Ω at 204°F engine temp the sender is spent.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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