Author Topic: replacing ammeter with early 90's volt meter? almost plug and play?  (Read 352 times)

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Offline rc12102

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I've seen posts about doing this but never any definitive how-to or if there were any issues.  If I can get a voltmeter out of a early 90's dodge truck with the same unstrument cluster, are there any issues with replacing the ammeter with it?

I've already done the ammeter bypass and, like many of you here, hate the fact that I have a non-working gauge AND would also need to add an aftermarket non-stock looking gauge to monitor charging issues.  With the bypass already done and running some additional wiring for the voltmeter, is there anything I'm missing?  What about the circuit board on the back of the cluster?  Does that only power the light behind the gauge or are there any issues with replacing with a similar dodge gauge?

I did notice this post and might consider doing this, although it still would probably bother me that it isn't stock looking:  https://ramchargercentral.com/vehicle-help/substitute-for-ammeter-gauge-using-digital-voltmeter/msg3450320/#msg3450320
1986 RC 150 Royal SE 4x4 360
3/4 ton axles; soon to be 408/a518

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    Offline rc12102

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    Re: replacing ammeter with early 90's volt meter? almost plug and play?
    « Reply #1 on: August 6, 2020, 02:44:01 pm »
    Would this even be the right one? 

    While it looks the right shape, the mounting points are way different than the ammeter.
    1986 RC 150 Royal SE 4x4 360
    3/4 ton axles; soon to be 408/a518

    Offline ToxicDoc

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    Re: replacing ammeter with early 90's volt meter? almost plug and play?
    « Reply #2 on: August 7, 2020, 06:14:44 pm »
    That's the correct voltmeter for the later vehicles, but it doesn't fit. It would require a lot of modifying. I sent my dash instruments to a gauge company for conversion to a voltmeter which worked out nicely
    '85 W150 SB, 408 stroker, Magnum manifolds, Performer RPM, 670 Truck Avenger, HEI ignition, Auburn LSD 9.25 and '82 D44 (non-CAD) with 3.55/3.54,  NV4500/NP241