electic
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yes checked the grounds i took the coumputer apart and there was a burnt spot in it but im not 100% sure its the ecc im only getting 5 volts out of it... the key switch is turning off and on fine i got it riged on a switch giveing it 12 volts and you can hear the relays working fine
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Joined: Apr 2005
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From: Longview, TX
For a burnt spot in the computer.
Ford GM ECU ECM PCM TCU Lexus Toyota Honda Acura repair used Mitsubishi
Ford GM ECU ECM PCM TCU Lexus Toyota Honda Acura repair used Mitsubishi
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From: Gateway to the West
Can't be the computer. The power for the fuel pump relay comes from PIN 57 of the computer true. HOWEVER, the EEC power relay gets power from the positive side of the ignition coil via the distributor wiring harness. EEC power relay is what feeds battery voltage TO the EEC computer. It does NOT get power FROM the EEC computer. So if there isn't enough voltage at the WHITE/LT. BLUE wire into the EEC-IV power relay the problem isn't in the computer... its in the electrical system upstream of the relay.
As for the +5VDC, the EEC-IV computer DOES generate this voltage for EVERY sensor in the truck except the HEGO sensor. So, if you are getting +5VDC at PIN 26 AND the power supply pin for each sensor, that only proves the +5VDC power transformer inside the computer is working properly.
As for the +5VDC, the EEC-IV computer DOES generate this voltage for EVERY sensor in the truck except the HEGO sensor. So, if you are getting +5VDC at PIN 26 AND the power supply pin for each sensor, that only proves the +5VDC power transformer inside the computer is working properly.
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Im getting 12volts out of the wht/lt.blu and pin 57 ties into 37 the red wire goes to the relays were im not getting the power it needs........and i think haynes aint worth a crap it dont show no wht/lt..blu going to the relay evan though we both knows it does
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From: Gateway to the West
That's weird because my Haynes manual is where I pulled that info!
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yeah theres 2 difrent ones i just found one with all the detail in it... it had 5 pages to my 1
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From: Gateway to the West
You aren't the first person to mention this. I still am not sure why Haynes would take information out of a manual but evidently newer editions have less detail than the older ones. The last copyright date in mine is 1996.
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