Fusible Link/ Duckfoot Question

[Firehawk200110]

Does anyone have a picture of a factory duckfoot junction for the fusible links? I think I have a wire broken a missing from mine, but I have no idea what color wire I'm looking for or where goes. I'm chasing the common no charging/speedo/overdrive issue.

 

[NIsaacs]

I just went and looked at my '91.5, it is the same as yours. It also looks like one wire is missing but I don't think so. Every thing is working anyway.

 

[Firehawk200110]

Thanks for the quick reply. I won't worry about it then. I forgot to mention mine truck is a 93 if that matters. I think your 91.⁵ should be the same though.

 

[Timd32]

If that is all in that one connector I think its a second Gray and it might feed Fuse 15 which is a 10A fuse.

Not 100% but looks like 2 orange, 2 gray, 1 Drk Green.

The Gray (*** edit) you have transitions to the Red with White, there appears to be a second Gray that transitions to Black with Red Stripe.

With how green that connection looks been a while, probably fixed a different way.

Good luck with your fix.

 

[Firehawk200110]

Got some of the fusible links gone. At least the worst ones got replaced at the moment. Still don't have the alternator changing yet. Have signal from the ecm on the blue wire (on/off voltage) but no voltage on the green. If I read correctly the green wire is ignition/key on voltage. I don't know where that wire goes but couldn't I just run another 12v wire from somewhere else?

 

[Timd32]

There were a couple more drawings in the file.

Physically I have no clue as mines a 96.

Maybe someone knows more about the 1st Gens can jump in.

 

[sdeeter19555]

Doesn't the crank position sensor tell the PMCM that the engine is running and to start charging?

 

[Ozymandias]

Is the Alternator in that old truck externally regulated?

 

[sdeeter19555]

Is the Alternator in that old truck externally regulated?

93 would be PCM, 91 would have been the changeover from external VR to PCM controlled.

 

[Ozymandias]

93 would be PCM, 91 would have been the changeover from external VR to PCM controlled.

Thank you, haven't expected that in a first Gen.

 

[ofelas]

'92 & '93 are SBEC controlled charging.
'89 to '91.5 were external VR controlled.