coolant gauge inop.

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89broncobuc

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can someone give me a run down on how to diagnose this? I would hate to be driving around and blow the radiator.

 
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89broncobuc

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josteve said:
The gauge won't protect the radiator; the cap does that.

Pull the R/Wh wire straight off the sender & ground it to the block, intake, or head. Then turn the key to RUN. If the needle pegs, replace the sender. If not, diagnose the circuit. Also, read this caption:

coolanttempsender.jpg

If you put some specs in a signature, I could give you more info: year, trim level, engine, trans, miles, & mods are good to include. An avatar of the truck is also useful.
Thank you so much, between you and a friend of mine i got the info i needed thanks again

 
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dfos351

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What about the same problem on a 90 with a 5.8? And it has a new temp sensor.

 

chuckles1856

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Got a question on this temp sensor....does it feed into the ECM to be used there or is it just used by the temp gauge in the console?

 

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