A Few Electrical issues

[RSG]

I had similar symptoms a few years ago, and found a wire in the shift column behind the lock was shorting. Post #2 below reports it was the OD wire. The key symptom for these though is fuse #19 blows...so this may not help. But the GEM module is also on #19 iirc.
Here are some links from previous posters -- you'll have to cut & past into a window, sorry, but maybe worth the effort:

1) http://www.superdutydiesel.com/foru...amp-OD-button&highlight=steering+column+short
2) http://www.superdutydiesel.com/foru...Ford-F-250-SD&highlight=steering+column+short
3) http://www.superdutydiesel.com/foru...ule-Questions&highlight=steering+column+short

 

[GunnyP]

Unreadable

View attachment 13410

Thank you so much for the effort in response, however I cannot read the JPEG as they are too small even when printed would you be able to Email them to me [email protected]. Come to find out that the GEM module in the vehicle was not the right one for the truck. I will replace today and update any status of change.

 

[GunnyP]

Well I have replaced GEM and 4x4 works fine but still no keyless entry, speedometer or odometer. Also power locks do not work. I can hear a click under the dash but noting moves

 

[GunnyP]

Ok update. No power to the vss in the rear or abs sensor in the front, still not sure. The OD wire has been cut so I removed from plug. Would this cause the problem? Power locks click under the dash but do not engage. Where should I look next. I found 2 fused links but they both look ok

 

[GunnyP]

Ok so There is a new GEM module in a rear VSS in and no change. I have checked ground near the battery seems to be good. I cannot get an indication of power into the ABS system. I have replaced the shift lever with the OD light flashing. No ABS light but unsure if the bulb is not burnt out. Am I missing something? Could there be a chip or programmed code in the PCM or GEM that needs to be reset? Im no auto electrician or mechanic by far but this is driving me a little crazy, could there be a fuse missing where it should be? I bought this truck to fix up for a work horse.

 

[JLDickmon]

Ok update. No power to the vss in the rear or abs sensor in the front, still not sure. The OD wire has been cut so I removed from plug. Would this cause the problem? Power locks click under the dash but do not engage. Where should I look next. I found 2 fused links but they both look ok

The VSS and ABS sensors are AC square wave generators. As the truck picks up speed, the voltage they produce increases.

 

[JLDickmon]

Ok so There is a new GEM module in a rear VSS in and no change. I have checked ground near the battery seems to be good. I cannot get an indication of power into the ABS system. I have replaced the shift lever with the OD light flashing. No ABS light but unsure if the bulb is not burnt out. Am I missing something? Could there be a chip or programmed code in the PCM or GEM that needs to be reset? Im no auto electrician or mechanic by far but this is driving me a little crazy, could there be a fuse missing where it should be? I bought this truck to fix up for a work horse.

What do you have for tools? Test light? Voltmeter? Multimeter? Jumper wires? Backprobe pins?
I might send you shopping at Sears before we get much further here...

 

[GunnyP]

Haha I have a test light, multimeter and jumper wires. I have changed ground to the abs and now have power going in. I did some reading to find out that the vss created its own voltage after I posted. Should there be power to the abs sensors? Today I will change the diff fluid and try a reset to the PCM. I have aftermaket lights so the could be causing interference. Also should I see power coming out of the abs module? If so which wires? Thanks for your reply

 

[DaveBen]

Haha I have a test light, multimeter and jumper wires. I have changed ground to the abs and now have power going in. I did some reading to find out that the vss created its own voltage after I posted. Should there be power to the abs sensors? Today I will change the diff fluid and try a reset to the PCM. I have aftermaket lights so the could be causing interference. Also should I see power coming out of the abs module? If so which wires? Thanks for your reply

No there should not be power to the abs sensor. It is a pick-up coil and it will generate a sine wave as the wheel inside the dif spins. The PCM will 'count' the number of wave cycles to determine the axle speed.

Dave

 

[JLDickmon]

Yes.
Power inputs to the ABS controller are red/lt green wire from brake pedal switch,
tan/red from dash fuse 25
orange/yellow wire from the 60a ABS fuse in the junction box under the hood