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Old 10-09-2019, 06:26 AM
dennardo dennardo is offline
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I got it fixed - it was the gauge. I bought a copy of the service manual and followed it's diagnostics. I used a multi-meter to check the resistivity of the sensor and it returned values that made sense. I got a voltage reading from the lead to the sensor, but it was less than 1V, and the manual says that if this lead does not have a voltage of ~12V to check fuses, wire bundle or the gauge itself. All fuses were fine and the wire bundle looks OK where I can see it so I thought I would start with the gauge. I opened it up and it is a very simple circuit board with only 6 or 7 components on it. Some of the soldering didn't look very good so I touched up all the solder points and re-installed. It works now.
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aurthuritis (10-09-2019), bordercollie (10-09-2019), Cajunrotor (10-11-2019), Doc  (10-09-2019), v10rick (10-09-2019)