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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

What Does This Control?

Old Jun 3, 2007 | 12:11 PM
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What Does This Control?

Part #E4TZ12A6-A
It is a relay that is located under the dash. On the PS side of the ash tray. This is om my '85F150, 4.9L, 1bbl carb, C6 Automatic, 4X2, w/ AC.

Does this relay have anything to do with the computer?
 
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Old Jun 3, 2007 | 08:53 PM
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You could unplug it and find out what doesn't work. I really don't know what it's for.
 
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Old Jun 3, 2007 | 09:04 PM
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Is it the fuel cut off switch? does it have a little button on it.
 
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Old Jun 3, 2007 | 09:04 PM
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fuel cut off relay?

Is it the fuel cut off switch? does it have a little button on it.
 
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Old Jun 3, 2007 | 09:18 PM
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Originally Posted by PaulzF150
Part #E4TZ12A6-A
It is a relay that is located under the dash. On the PS side of the ash tray. This is om my '85F150, 4.9L, 1bbl carb, C6 Automatic, 4X2, w/ AC.

Does this relay have anything to do with the computer?
The processor (computer) is Ford basic number 12A650 so the answer is yes, same 12600 group. However, you are missing the rest of the basic number (12A6??), and where is it marked E4TZ? Ford didn't mark parts with the Z unless you are looking at a parts label someone left on the part. Ford only used engineering/casting numbers to ID parts, and used A, B, E. or F (usually) for the last digit in the prefix (E4TA, or B, or E, or F).


Here's the only relay I found with a 12A6xx basic number: ECC Relay ~ marked: E47F-12A646-A1A


Actual Ford part number: E4TZ-12A646-A (Motorcraft DY-443)


NOTE: Anything fuel related will have a Ford basic part number beginning with 9. The fuel related group in the parts catalogs is 9000.
 

Last edited by NumberDummy; Jun 3, 2007 at 09:51 PM.
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Old Jun 4, 2007 | 02:10 PM
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Thanks for replying everybody. I unplugged the relay and found that the gauges and blower motor will not work. The reason I posted is that there is a crackling sound coming from the relay. This has happened once before as the result of a short. So I am leaning towards the idea that There is another short. I am pretty clueless when it comes to troubleshooting electrical problems, so it is time to bring the truck to the shop.
 
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