Question about 1992 Ford Explorer

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EEC fuse keeps blowing

Cant find any shorts- repalces relays omg help

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Replace with a fuse 5 amps higher than required, keep increasing until it stops

Posted on Jun 17, 2009

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I have a 1990 Ford ranger 4.0 it will turn over but not start. It keep blowing the eec fuse and shutting off power to the fuel pump. I replaced both the eec and fuel pump relay. Any info would help


Hi Michael
The Relay is only a heavy duty switch (contacts) operated by an electromagnet from a smaller switch.
So actually, when the relay is removed, you have 2 distinct circuits. One low current that actuates the Relay electromagnet and on the other side are a set of large contacts that supply + to the pump.
So , does the fuse still blow when the relay is pulled out?
Is the fuse circuit that blows supplying voltage to the relay coil (magnet) or is it on the Fuel Pump side.
You could use a jumper from Bat+ directly to the pump to prove that the pump is OK, then reconnect the pump wire and follow this wire back to the appropriate terminal at the relay socket (relay removed) and try to power it from there. The purpose being to establish if the wiring from the relay to the pump is shorted somewhere.
A slow, methodical process of elimination will get you there!
Good Luck

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Jul 03, 2015 | Ford Cars & Trucks

1 Answer

Should there be fusible links before and after the wire that runs direct from solenoid to the EEC relay?


There can be all sorts of reasons for this...sound more like you have a dead short somewhere. Go here ...
http://www.ford-trucks.com/forums/forum28/ It's free to join, these guys will get you figured out in no time at all.

May 27, 2015 | 1987 Ford Ranger

1 Answer

1994 mustang GT 5.0 blows 20 amp EEC fuse


Have a short. This procedure may help out. Need test light and volt meter.

1. Disconnect C104 and see if the Red (RD) wire out of the Constant Control Relay Module (CCRM) (pin 12 and/or 24) is shorting to ground, to verify which side of the connector the circuit is shorted.

2. If the RD wire no longer indicates a short to ground after disconnecting C104, inspect the engine harness feeding the injectors, Idle Air Control (IAC) solenoid and Canister Purge (CANP) solenoid for chafing against bare metal on top of the engine.

3. If the RD wire still indicates a short to ground after disconnecting the C104 connector, inspect the harness to the secondary air injection solenoids, EGR Vacuum Regulator (EVR) solenoid, Mass Air Flow (MAF) and Powertrain Control Module (PCM) for a short to ground.
INFO Tip C104 is a 42-terminal connector located at the rear passenger side of the engine, near the A/C accumulator.

Nov 16, 2013 | Cars & Trucks

1 Answer

EEC relay fuse keeps blowing id put a new fuse in the truck it would run for about 10 seconds then blow the fuse again.


There are 3 relays mounted below the fuse box .
The green I believe is fuel pump relay and the brown is EEC. The third relay is for the A/C WOT.
It is possible the wiring is shorted, check there, it is also possible you have a bad fuel pump.
Please let me know what you find.

Feb 07, 2010 | 1991 Ford Explorer

1 Answer

Ford explorer eec relay


Try a new relay first. This may not be good news if that does not work. If you can find the EEC (computer) and unplug it, then replace the fuse-if it blows you have another cheaper part on the circuit thats bad.
If the fuse does not blow, then the EEC must be shorted.
If you have to replace the EEC you may find a kindly dealer with a cash-for-clunker sitting there to violate. Salvage yards have them, Ebay sells them. I have seen them at swap meets for $20. They are a high price part even rebuilt at Dealers or autoparts stores.

Aug 24, 2009 | 1991 Ford Explorer

1 Answer

1991 ford ranger 3.0 eec relay fuse keeps blowing fuel good no spark.Changed the distribitor, changed the ignition module.


I understand that there is a relay box under the hood with 3 relays. Which is which I don't know. However if you are blowing the fuse TO the ecc relay, then the relay must be bad. This relay controls the spark.

Jul 25, 2009 | Ford Focus Cars & Trucks

1 Answer

My eec relay on my 1992 ford exporler keeps blowing its a 30amm relay the car run for ten to twenty seconds then the relay blow car then the car cranks over but does not start any help would be apprecited.


There is a short some where in the circuit. Get a Haynes manual part # 36024 covers 91 thru 2000 it will tell you a lot of info on troubleshooting the wiring. Good luck

Aug 03, 2008 | 1997 Ford Explorer AWD

1 Answer

EEC fuse: 1992 ford explorer


sounds like you have a bad relay that is shorted out or you might have a bad fuel injector shorting out fossible fuel pump wireing short do some probing aroun with the multi meter try to find direct short , use the process of elimination .
now let me see does your truck start up and run then fuse blows? is the fuse the correct amperage check your owners manual to see how long does it run before blowing fuse ? when its running is it running smooth while is running?

Jul 03, 2008 | 1992 Ford Explorer

2 Answers

E.E.C fuse keeps blowing in 1991 Ford Explorer


sounds like you got a short try tracing harness to see if theres anything visible

May 26, 2008 | 1991 Ford Explorer

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