EEC relay location?
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EEC relay location?
1993 F150 XL 4.9L 4x4 MT
I have a no spark issue, no fuel prime and no check engine light with KOEO which leads me to believe its an EEC issue.
Where is the damn EEC relay? I did a search here and didn't find a clear answer. In the power control box (fuse box) under the hood all the relays are black, I understood the EEC relay to be brown?
Any help would greatly be appreciated
I have a no spark issue, no fuel prime and no check engine light with KOEO which leads me to believe its an EEC issue.
Where is the damn EEC relay? I did a search here and didn't find a clear answer. In the power control box (fuse box) under the hood all the relays are black, I understood the EEC relay to be brown?
Any help would greatly be appreciated
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I tried that one, it appears to be good, I switched the horn relay with the ECM relay and the horn worked.
Whats the next step with the symptoms im having? pull and inspect the PCM?
Fleet Owner
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From: Easton,Ks
If so ground pin #6 or jump it to pin 2 of the EEC test plug and see if the fuel pumps run when you turn on the key.
If they do make sure the PCM has a good ground (pins 40 & 60) at the ground point on the passenger fender and also has power to pins 37 & 57.
If you have power and grounds and the fuel pumps run when you turn on the key with pin #6 grounded or jumped to pin 2 of the EEC test plug then change out the PCM Computer.
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Does the PCM Power relay click when the key is turned on?
If so ground pin #6 or jump it to pin 2 of the EEC test plug and see if the fuel pumps run when you turn on the key.
If they do make sure the PCM has a good ground (pins 40 & 60) at the ground point on the passenger fender and also has power to pins 37 & 57.
If you have power and grounds and the fuel pumps run when you turn on the key with pin #6 grounded or jumped to pin 2 of the EEC test plug then change out the PCM Computer.
/
If so ground pin #6 or jump it to pin 2 of the EEC test plug and see if the fuel pumps run when you turn on the key.
If they do make sure the PCM has a good ground (pins 40 & 60) at the ground point on the passenger fender and also has power to pins 37 & 57.
If you have power and grounds and the fuel pumps run when you turn on the key with pin #6 grounded or jumped to pin 2 of the EEC test plug then change out the PCM Computer.
/
Thanks for the help! Vehicle electronics are very aggravating and not my strong suit
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
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Yes, those grounds appear to be good.
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Sorry to bring up such an old thread, but I'm banging my head against a wall, and this picture says it's not available. What did you end up determining to be the cause? Tyia!
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he prolly wont answer you hasnt been on since the issue, try what subford said, in post #5, or link below
Fuel Injection Technical Library » No Codes?
Fuel Injection Technical Library » No Codes?
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Sharpshooter77
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 18, 2009 10:31 AM