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Old 01-10-2019, 06:00 PM   #1
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Join Date: Jan 2019
Posts: 7
Cummins ISB 160 Temp Gauge not working

In a 2001 Monaco Knight with a Cummins ISB 160, the temperature gauge has suddenly stopped working. No indication at all. Replaced the sending unit with still no indication on the dash gauge. Any suggestions?

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Old 01-10-2019, 06:21 PM   #2
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Hi Bob; If the wire to the coolant gauge on the dash is just one wire only that pushes onto the sender, pull the sending wire off. Have someone on the inside turn the ing. switch to on. Using something like a paper clip, depending on how the connector hooks onto the sending unit, ground the paper clip that is inserted into the sending wire to the base of the sender screwed into the block, that is ground. If the gauge is working and there is a connection from the wire to the dash, the gauge should go all the way to hot on the gauge. Just do this long enough to see if the gauge moves. If no gauge movement, might need to check the ground wire strip which should be located on the firewall in the generator compartment. Look for a bar with a lot of white wires attached to the ground bar. Also might need to check the back of the temp. gauge in the dash itself. The later is no fun if you have to pull the dash panel to check the back of the temp. gauge. Have done the gauge check on cars and truck for years that have just one wire to the temp. sending unit. Has always worked for me and the principle should be the same for the Cummin's. This is only a suggestion to try this and see if it works. Hope this info helps and good luck. If there are 2 wires to the temp. sending unit, I would not be up to speed on that set up.
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