The Ford Barn

Babyboomerboy · 03-27-2024, 06:50 PM

The car run fine. The speedometer works but the instrument gauges ( Bat. fuel, oil pressure) do not work. Could it be a fuse on the ignition under the dash that is blown? Or is it something else? It is on a 1950 Ford tudor Thanks

FortyNiner · 03-27-2024, 06:52 PM

First check the grounds.

pistonbroke · 03-28-2024, 08:48 AM

Power supply is most likely There is a little thing called an IVR (instrument voltage regulator ) on the back of the cluster . They are squareish and about one inch by one half usually with two studs for the terminals. Power comes in and then out to the instruments. My guess would be yours is defective. Tim

Bob C · 03-28-2024, 10:16 AM

Looking at the wiring diagram the instruments get their power from
the ignition switch, black wire with green tracer.

Kens 36 · 03-28-2024, 10:19 AM

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Bob C has it right. There is no fuse, there is no IVR. For example, the fuel gage has two wires connected to it. One from the sending unit and the other the power Bob mentions.

03-27-2024, 06:50 PM	#1
Babyboomerboy Member Join Date: Oct 2014 Location: Kansas Posts: 55	Instruments not working The car run fine. The speedometer works but the instrument gauges ( Bat. fuel, oil pressure) do not work. Could it be a fuse on the ignition under the dash that is blown? Or is it something else? It is on a 1950 Ford tudor Thanks

03-27-2024, 06:52 PM	#2
FortyNiner Senior Member Join Date: May 2012 Location: u-rah-rah-Wisconsin Posts: 1,137	Re: Instruments not working First check the grounds. __________________ 19 and 49 F1 - jes' like Henry II built 1946 Deluxe - as Henry built it

03-28-2024, 08:48 AM	#3
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 485	Re: Instruments not working Power supply is most likely There is a little thing called an IVR (instrument voltage regulator ) on the back of the cluster . They are squareish and about one inch by one half usually with two studs for the terminals. Power comes in and then out to the instruments. My guess would be yours is defective. Tim

03-28-2024, 10:16 AM	#4
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 8,754	Re: Instruments not working Looking at the wiring diagram the instruments get their power from the ignition switch, black wire with green tracer.

03-28-2024, 10:19 AM	#5
Kens 36 Senior Member Join Date: May 2010 Location: Northern Illinois Posts: 376	Re: Instruments not working Sponsored Links (Register now to hide all advertisements) Bob C has it right. There is no fuse, there is no IVR. For example, the fuel gage has two wires connected to it. One from the sending unit and the other the power Bob mentions. __________________ https://www.nirgv8.org