95 wont crank - Ford Powerstroke Diesel Forum
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Old 12-03-2011, 12:56 PM
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95 wont crank

hey all i just picked up a 95 f250 5 speed and was tinkerin around with it and found what looked like a jump wire in a plug in under the dash, well i pulled it out now the truck wont try to crank over so i started trial and error on the plug to put the wire back in and most of the holes didnt do anything but one combo turned the truck over with out me pushin the clutch or anything! any you guys ever heard of this issue? I guess thats what i get being a Dodge Cummins guy messin around with fords lol
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Old 12-04-2011, 09:48 AM
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Sounds like somebody jumped the Clutch Interlock switch connector. Normally its connected to the switch so that the truck can't be started without the clutch pedal being depressed. Whether the previous owner had issue with the clutch pedal linkage being sloppy and not closing the switch, just a bad switch, or didn't like the safety feature of the switch, it seems it may have been jumped to fool the PCM into thinking the clutch pedal has been depressed. On a 95 harness connector you would jump between the Teal with Light Blue trace wire and the White with Purple trace wire (pins 3 & 4) and (separately) the Red with Light Blue trace wires (pins 5 & 6). Cheers!
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Old 12-04-2011, 11:13 AM
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It doesn't fool the PCM. That wire goes right to the starter relay. The starter circuit is straight electromechanics; it'll crank the engine with the PCM unplugged.

Without that switch connected (or jumpered), you also won't have cruise control.
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Old 12-04-2011, 07:25 PM
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Quote:
Originally Posted by madpogue View Post
It doesn't fool the PCM
Half right
With it jumpered the way I mentioned (both portions) it does fool the PCM for the cruise control portion. Cheers!
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Old 12-05-2011, 12:21 PM
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Alright ill give it a try and thanks I'm brand new to the Ford world but other than this issue I've been very happy with the truck

Sent from my PC36100 using AutoGuide App
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