Electrical Help

[bkokotovic]

Can anyone with a schematic take a look at something for me, please.



I have a 1990 W250, 5-speed, reg. cab.



Every once in a while, mainly when cold, the HVAC motor will not blow. At the same time, the power windows will not operate. These two circuits must somehow be connected, because one inop will not happen without the other.



any ideas? The fuses are ok. I haven't really dug too deep.



Thanks as always.



B

 

[Steve Graham]

Check the ignition switch. On another truck I owned the ignition would not return to the run position after starting unless I turned it back manually. It would leave it in a "non contact" area and my blowers motors would not work.





Steve

 

[Paychk]

I Second Steve



Mine does the same thing from time to time... ..... also the radio won't come on and if it is bad enough the starter won't disengage.