wiring to E4OD
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Senior User
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From: Atascadero, CA
wiring to E4OD
93 F-150 5.0 with E4OD. Replaced Transmission bought new safety switch from Autozone. (mistake @1) It came with the later style plug and a new plug to switch over. All wires are in proper place checked against another harness. Now when the headlights are turned on the truck dies and will not start. Turn off lights and it starts. Truck will run with the light switch in the parking light position but the parking lights will not come on. Any Ideas?
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From: Northern California
93 F-150 5.0 with E4OD. Replaced Transmission bought new safety switch from Autozone. (mistake @1) It came with the later style plug and a new plug to switch over. All wires are in proper place checked against another harness. Now when the headlights are turned on the truck dies and will not start. Turn off lights and it starts. Truck will run with the light switch in the parking light position but the parking lights will not come on. Any Ideas?
You probably matched pin for pin in the new plug vs old plug, but it probably doesnt match up correctly to the circuitry of the new switch.
You need to get schematics for both your truck, and the "later style safety switch" and match the circuit wiring of your truck to your new switch within the "plug".
Been there and living it with my E4OD transmission wiring right now......If I'm lucky, I haven't destroyed the transmission and the engine........which would be cost prohibitive to repair.......my truck may end up at a scrap yard.
Don't mess around with this......correct it now !!!!
Bob
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From: Easton,Ks
93 F-150 5.0 with E4OD. Replaced Transmission bought new safety switch from Autozone. (mistake @1) It came with the later style plug and a new plug to switch over. All wires are in proper place checked against another harness. Now when the headlights are turned on the truck dies and will not start. Turn off lights and it starts. Truck will run with the light switch in the parking light position but the parking lights will not come on. Any Ideas?
When you turn on the headlights you lose the ground for something and it dies.
My first guess would be you lost the body ground (G101). There should be three wires on this ground stud. One large one from the NEG post of the battery and two smaller wires.
/
Elder User
Joined: Dec 2003
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From: Northern California
93 F-150 5.0 with E4OD. Replaced Transmission bought new safety switch from Autozone. (mistake @1) It came with the later style plug and a new plug to switch over. All wires are in proper place checked against another harness. Now when the headlights are turned on the truck dies and will not start. Turn off lights and it starts. Truck will run with the light switch in the parking light position but the parking lights will not come on. Any Ideas?
You've missed the point here.
He updated the harness without verifying the circuitry in the updated "new safety switch" he bought froom autozone to match the existing circuitry in his truck.
He's got more than just a ground problem........
Bob
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From: Atascadero, CA
According to the instructions from Autozone it was supposed to be a position to position match. I got another harness from the same year that had the new style plug that had the Ford part # on the plug and it was wires the same way. But will try to find the schematics to verify position of the wires.
Checked the G101 ground and cleaned it no difference. Checking all the grounds I can find to make sure they are good.
Thanks for the help and ideas
Checked the G101 ground and cleaned it no difference. Checking all the grounds I can find to make sure they are good.
Thanks for the help and ideas
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Did you position correctly?
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1983 Ford Bronco TSBs & FSAs (Recalls) for '83-96 Broncos & F150s picture | SuperMotors.net
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From: Easton,Ks
It is cranking so the safety switch (if you want to call it that) must be close to adjustment.
The safety switch:
Check the grounds on the other side also:
A bad ground is about the only thing that would do this.
Elder User
Joined: Dec 2003
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From: Northern California
You're trying to put a '95 part in your '93 truck.
That's why they they included a new connector.
It isn't going to work correctly unless you do a complete pin-out change/correction in the "new connector" to match your trucks electrical system (computer).
Doable, but time consuming.
Bob
Elder User
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From: Northern California
There are no wires from the safety switch that would cause this.
It is cranking so the safety switch (if you want to call it that) must be close to adjustment.
The safety switch:
Check the grounds on the other side also:
A bad ground is about the only thing that would do this.
It is cranking so the safety switch (if you want to call it that) must be close to adjustment.
The safety switch:
Check the grounds on the other side also:
A bad ground is about the only thing that would do this.
If you can find it, I think it had a header entitled "diagnostic procedures" and "solenoid operation" please re-post it here.
If you look at the difference between the '95-'96 version as opposed to the '94 version you'll see that the pin-outs are completely different and the pin locations are numbered differently within the connector.
I just found this wiring problem of 8 years in my truck.
My transmission shifts poorly in reverse, has ran hot which has led to a leaking front seal, previously warped the head in the engine (trans cooler is in the radiator), and I'm experiencing an electronic "stumble" (within the computer) at about 1400 RPMS.
Most likely due to incorrect wiring at the harness connector.
He's gotta' do some serious schematic and part matching via the "new connector" he installed.
That's my story,
Bob
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From: Easton,Ks
But I will post it at the bottom of this post but it would have nothing to do with the OP problem.
The problem here is trying to tie the headlight to the engine dieing.
However he wired the sensor should not have let the engine run and then die when the headlights are turn on.
It sounds to me as if the computer grounds at the body ground are getting their ground through the headlight bulb and back to the NEG post of the battery. When the lights are turned on you kill that ground and then the computer has no ground and stops the spark and fuel.
But here is the image that Bob wanted posted:
/
Elder User
Joined: Dec 2003
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From: Northern California
I am so fixated with my transmission woes that I applied all of my blabbing
to the MLPS and connector. WRONG PART BOB.....DUH.
I do sincerely appologize for the confusion I created in this thread.
Thank you Bill for posting the "picture" I was requesting......I know you put in time and effort to find it and post it for me, and I do appreciate that effort.
Guess I better step back and not say anything else,
Bob