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Old 12-30-2018, 08:21 PM   #4
ray_mcavoy
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Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,373
Re: How do the voltmeters work in these trucks?

Quote:
Originally Posted by kipps View Post
The second pic shows the backside of the voltmeter when installed. Note that the right pin does not contact the circuit board. For anyone who's putting one together from scratch -- resist the urge to add that connection. It looks possible, but should not be there.
Yes, that's the terminal I was describing that only serves to connect the resistor to the meter's internal coil and does not have any connection to the cluster's printed circuit. This arrangement puts the current limiting resistor in series with the coil inside the voltmeter.

Quote:
Originally Posted by kipps View Post
For that matter, it looks like the oil and temp gauges have a similar two/three pin arrangement with a resistor between the two terminals.
Yes, the oil pressure & temperature gauges (as well as the fuel gauge) do have a similar looking terminal / resistor arrangement. However, these gauges each have 3 connections to the cluster's printed circuit ... power, ground, and sending unit.
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