Question about 1995 Ford Contour

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Bad engine wiring harness makes my vehicle not even wanna start

Welll its the engine harness that is shortin causes the pcm to blow. ford said this problem is common in these cars.ok. but what if i had the harness completely re wired with bigger wires from each connector to pigtal. would the harness work. again or do u think it would fail

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I think you're best off getting a replacement harness - rewiring the harness is probably too much work and you don't really want to go messing with the resistances of the wiring.

Just my opinion,

Posted on Dec 13, 2009

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I think thats a great idea to rewire the harnes and use the existing plastic connectors, and replace the pig tails, it would save you allot of money in the long run, cause a new wiring harness can run more then $350,00.... So I say great idea, plus the satisfaction of fixing something ones self is quit rewarding! Have fun and God Bless You this New Year! We need to become more independant with our veicals! Truly Jasen

Posted on Jan 12, 2010


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1995 ford ranger pcm blowing

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2001 Ford Escape 3.0L V6 Engine Code P1409

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* One or more IAC circuits open or shorted to ground
* One or more IAC circuits are shorted to voltage
* IAC has failed
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Possible Solutions:
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* If there are no wiring problems, and the code keeps returning with the IAC unplugged, you can check the PCM by removing the IAC wires from the PCM connector (or clipping the wires in a location where they can be repaired easily) and then start the engine (If you're not sure, don't do it. Take it to a qualified professional). Now if the code doesn't reset there is a problem with the wiring. Check for continuity on all the IAC wires. Any resistance points to a problem. Check for voltage on any(At this point there shouldn't be any voltages on the wires because they're clipped at one end and unplugged at the IAC). Repair as necessary. But if the P0505 code DOES reset after removing the IAC wires from the PCM connector(or clipping them), replace the PCM, there's a problem internally on the IAC control circuit.

Hope helps (remember to rate and comment this).

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Probable cause: Wiring, APP or ECM

GM - P1271 Accelerator Pedal Position Sensor 1-2 Correlation

I also found this... though its for Trailblazers... but may give you a clue:
Reduced Engine Power Message and/or Check Engine Light with any Combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682 #PIP3192 - (Oct 18, 2004)

Reduced Engine Power Message and/or Check Engine Light with any Combination of the Following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682 PCM Repeat.

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Reduced engine power message and/or check engine light with any combination of the following DTCs: P0107 P0112 P0122 P0452 P1120 P1220 P1221 P1271 P1275 P1280 P1481 P1515 P1540 P1633 P1635 P1639 P1682

If the SI diagnostics did not isolate a concern, the following information may be helpful:
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- Inspect the 3 harnesses that connect to the PCM for potential shorts to ground on the metal PCM mounting bracket, just below the PCM. There are plastic harness retainers on the PCM bracket that secure the harnesses to the PCM bracket. If the harness conduit is mispositioned, some of the wiring may become exposed and chaff on the PCM bracket. This may eventually cause the exposed circuit to short to ground.

- If a chaffed circuit is found in either of the above locations, repair the circuit using the necessary SI procedures. Once the circuit is repaired, tape the area of the affected area of the harness to prevent the wires from becoming exposed in the future and secure the harness using the original harness retainer.

This applies to 04:
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- 4.2L 5.3L LL8 LM4 Engine with DTC - P2120 or P2122 or P2123 or P2125 or P2127 or P2128.

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

MIL light on. Reduced Power message on DIC. Possibles DTCs P2120 and/or P2122, P2123, P2127, and P2128.

The APP harness is clipped to the accelerator pedal bracket. The harness may chaff on the upper portion of the accelerator pedal causing a short to ground. Verify the harness is not chaffing on the accelerator pedal. After repairing the short, reposition the harness to ensure no contact between the harness and the accelerator pedal.

Hope helpes.

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You may have an engine wire harness that has the wiing insulation decomposing causing wires to short against each other. Peel open the plastic convolute and look for cracks in the insulation. Here is info on a Ford program to repair if less than 100,000 miles on your car.

October, 1999
All Ford and Lincoln-Mercury Dealers
Owner Notification Program 99M03 - Certain 1995-1997 Contour and Mystique vehicles - Under Hood Wire Harness - Additional Coverage.
This program provides extended coverage on certain under hood wire harnesses through 10 years or 100,000 miles which ever occurs first, from the original warranty start date. AFFECTED VEHICLES
Certain 1995 - 1997 Contour and Mystique vehicles built from Job #1 1995 through Model Year End 1997. REASON FOR RECALL
Under ambient factors of high temperature and high humidity, certain 1995 - 1997 Contour and Mystique vehicles may be susceptible to the wiring insulation becoming brittle and cracking on certain engine compartment wiring harnesses. These harnesses deliver electrical power to the engine and its cooling and control systems, the climate control, and other power distribution systems. If wire harness insulation cracking is found during the additional warranty period, the under hood wire harnesses are to be replaced at no charge to the customer. SERVICE ACTION
Additional Warranty Coverage
Effective immediately, Ford is providing additional coverage for the replacement of the under hood wire harnesses on these vehicles for a period of 10 years or 100,000 miles, which ever occurs first, from the original warranty start date. This coverage exceeds the provisions of the original component warranty coverage on the affected vehicles and is automatically transferred to subsequent owners at no charge. This additional coverage does not include normal service diagnostic or repair charges unrelated to wire harness brittleness and cracking. After this additional coverage has expired, wire harness replacements will be at the expense of the vehicle owner.


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