Trouble installing fuel module - Team Camaro Tech
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post #1 of 5 (permalink) Old Feb 29th, 12, 08:54 AM Thread Starter
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Trouble installing fuel module

I know there are a ton of posts on this and I read them all. My issue is I've got everything wired right with my new module, my fuel guage was reading 5/8 of a tank before I replaced it with a tach. That matches with the ohm reading I have going to my sending unit (reading 53ohms). The problem is at that high of an ohm reading it is triggering the ground (yellow) wire to switch the light to on. I sent back one module already for the same issue. Am I missing something?
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post #2 of 5 (permalink) Old Feb 29th, 12, 01:05 PM Thread Starter
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Re: Trouble installing fuel module

I'm guessing it's fried because it won't under and circumstances allow the yellow wire to ground out. Are these things extremely sensitive or something?
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post #3 of 5 (permalink) Old Feb 29th, 12, 05:04 PM
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Re: Trouble installing fuel module

I'm going to assume you are speaking of an factory style low fuel warning light module? Also helpful to know what year as the modules are NOT interchangeable year to year. http://www.americanautowire.com/faq/?p=1024

OEM units had a light bulb socket in the module that should NEVER have a light bulb in it. If you do put one in it throws off the modules calibration and resistance settings. These OEM units fired off at 20 Ohms or less for a Camaro.

Replacement warning units do not have the socket and are made for various applications from Camaro, Corvette, Chevelle and Nova which all had different set points.

53 Ohms is over half a tank full so yeah it should not be activating if the set point on the module that is set to 20 Ohms. Maybe it is not a Camaro module? 20 Ohms is about at 1/4 tank to 1/8 tank which in the days of every corner being full service station, 1/8 of a tank was okay to warn you. Now that is not so helpful you would bone the tank dry long before you made it to a station.

The wires on some of the re-pop modules are very thin gauge and easy to break in the shielding maybe you have a flaky connection.

You can also increase the resistance across a stable working but incorrect module with a resistor from the Shack to bring the signal down to where you feel comfortable seeing the light.


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Last edited by 69-Pace; Feb 29th, 12 at 05:22 PM.
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post #4 of 5 (permalink) Old Mar 1st, 12, 02:12 AM Thread Starter
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Re: Trouble installing fuel module

Huh, interesting. The module I got was from ebay and was supposed to be for a camaro. Like I said I think it's fried now (no clue why) because I can't get it to trigger a ground on the yellow wire no matter what I do. Are these things super sensitive or something?
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post #5 of 5 (permalink) Old Mar 1st, 12, 04:29 AM
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Re: Trouble installing fuel module

No not really but as with any electronics, quality control in the manufacturing process proves out how long a device will function. No names vender on eBay or a real vendor? Sure it was for your year? Remember each year was a bit different. Since you still have not said your year I'm assuming '69 since that is what I have.

You would need to put a resistance load over the green sender wire in order to get the yellow to ground and power up the light. So you could bench test it with a potentialmeter from Radio Shack zero to 100 ohms (90 is the highest a factory tank sender will send)

If you are sure its fried I would purchase one from Ricks or Lectric Limited.


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