New guy with old Bronco

[mybronco]

Hi,

This my first entry into a web forum so please be kind.

I have a stock 1969 Bronco that is in very good condition, but has a perplexing problem with low readings on all the engine instruments. I have replaced the constant voltage power supply but that did not solve the problem. Before starting the engine and setting the ignition to "aux" the needles on the fuel gage will rise to the approximate correct amount of fuel in the tank. Then the needle slowly descends to a much lower value.

A similar thing occurs with the ignition set to "start', but the fuel needle rises to a lower

indication and falls more quickly. Running the engine does not correct this situation.

Anyone have any suggestion??

 

[Seabronc]

Welcome to the Zone > . Post some pictures.

To be quite honest, I don't know if the 69 had one of these, but if it were on in the 80's I'd say replace the instrument cluster voltage regulator.

Good luck,

>-

 

[mybronco]

Welcome to the Zone > .  Post some pictures.
To be quite honest, I don't know if the 69 had one of these, but if it were on in the 80's I'd say replace the instrument cluster voltage regulator.

Good luck,

>-

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Thanks Fred, but I have tried that and it did not help. However, I suppose it could be that the new regulator is also faulty.

Gene

 

[Seabronc]

Thanks Fred, but I have tried that and it did not help.  However, I suppose it could be that the new regulator is also faulty.
Gene

30063[/snapback]

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Ok, there isn't much in the fuel gauge circuit besides the gauge, wire, connectors and sender. Have you checked the voltage at the connector to the sender? to see what it reads under the various conditions. If it stays steady, then the sender probably is the culprit. It should stay at the level of the voltage regulator output level, off the top of my head I believe that is 5 volts. If it looks good at the connector, then there must be something wierd going on with the sender. The sender is just a resistive strip that a contact whipes on which changes the amount current flowing thru the gauge.

Good luck,

>-

 

[Minnesotabronco96]

Hi,
This my first entry into a web forum so please be kind.

29963[/snapback]

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welcome,

everybody here is nice and helpful.

although, watch out for bulldozer.

 

[wrachet]

Welcome to the Zone. This has been one of the best Bronco sites I have visited. I think that even if my Bronco sells...I'll still be coming in here! I would miss it too much if I didn't!

Colleen