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Seventy Two · 07-03-2020, 10:43 PM

DMJ and Terry, I'm convinced it was the resistor based on the wiring harness being in generally unmolested form. Also, before taking it for a spin, I was able to peg the temp needle hot AND Cold with the key on and the sender wire grounded and disconnected.

Of the two resistors I picked up for $1.00 each, I chose the 62 ohm resistor simply based on the popular info in this thread. Probably one of the cheapest but challenging fixes I've had to deal with in a while.

BTW, for what its worth, after installing the resistor into the cluster, the resistance across the (vertical) posts dropped to 45.5 ohms WITHOUT being connected to the cluster plug. After hooking up to the cluster plug the resistance dropped to 42.5 ohms.

I like were the gauge sits after the trucks been warmed up and I can actually tell when the thermostat opens up as it tends to drop the needle by about a needle width. Now it is a matter of time to see how it holds.

I hope to get a chance to help someone else on this site. It is great! I certainly appreciate everyone's input. Thanks to all who waded in on this one.

07-03-2020, 10:43 PM	#96
Seventy Two Registered User Join Date: Aug 2010 Location: Grande Prairie Alberta Posts: 105	Re: Temperture gauge is pegged on high DMJ and Terry, I'm convinced it was the resistor based on the wiring harness being in generally unmolested form. Also, before taking it for a spin, I was able to peg the temp needle hot AND Cold with the key on and the sender wire grounded and disconnected. Of the two resistors I picked up for $1.00 each, I chose the 62 ohm resistor simply based on the popular info in this thread. Probably one of the cheapest but challenging fixes I've had to deal with in a while. BTW, for what its worth, after installing the resistor into the cluster, the resistance across the (vertical) posts dropped to 45.5 ohms WITHOUT being connected to the cluster plug. After hooking up to the cluster plug the resistance dropped to 42.5 ohms. I like were the gauge sits after the trucks been warmed up and I can actually tell when the thermostat opens up as it tends to drop the needle by about a needle width. Now it is a matter of time to see how it holds. I hope to get a chance to help someone else on this site. It is great! I certainly appreciate everyone's input. Thanks to all who waded in on this one.