1999 4.o engine wiring diagram neede - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 08-01-2015
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1999 4.o engine wiring diagram neede

I did a valve job on my 1999 Ranger 4.0 pushrod engine and now am having trouble finding the correct plug placements. Does anyone have a book to recommend or a diagram to send?
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Old 08-01-2015
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When you lay the wiring harness back in place you should see where everything plugs in.

Wiring diagram here: | Repair Guides | Wiring Diagrams | Wiring Diagrams | AutoZone.com

But not sure if it will help you much.

The CKP(crank position) sensor is down at the front of the engine so there will be a longer wire the comes from back of engine(in main harness) to the front and then that longer wire goes down the front of the engine to the CKP sensor.
I often forget to hook that one up, engine won't start without it.

There is really not a lot of wiring in the main harness
CPS(cam position sensor) wire(back of engine)
Coil pack wire
6 fuel injector wires
IAC valve wire
TPS(throttle position sensor) wire
Engine temp sender(1 wire)
ECT sensor(2 wires)
CKP sensor

Think thats it

IAT(intake air temp) sensor was moved to MAF sensor in mid-90's

Oil pressure sender wire shouldn't be in that harness but could be at the back, and oil level sender would be with it.
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Old 08-03-2015
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Quote:
Originally Posted by RonD View Post
When you lay the wiring harness back in place you should see where everything plugs in.

Wiring diagram here: | Repair Guides | Wiring Diagrams | Wiring Diagrams | AutoZone.com

But not sure if it will help you much.

The CKP(crank position) sensor is down at the front of the engine so there will be a longer wire the comes from back of engine(in main harness) to the front and then that longer wire goes down the front of the engine to the CKP sensor.
I often forget to hook that one up, engine won't start without it.

There is really not a lot of wiring in the main harness
CPS(cam position sensor) wire(back of engine)
Coil pack wire
6 fuel injector wires
IAC valve wire
TPS(throttle position sensor) wire
Engine temp sender(1 wire)
ECT sensor(2 wires)
CKP sensor

Think thats it

IAT(intake air temp) sensor was moved to MAF sensor in mid-90's

Oil pressure sender wire shouldn't be in that harness but could be at the back, and oil level sender would be with it.
Thank you. I have a helper coming August 5 who is a Mustang drag racer. He was there when I began dismantling the top of the engine.
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