General Motors released a yearly manual of wiring diagrams for the P-30 chassis. For example, the 1992 manual was entitled "1992 Electrical Diagrams and Diagnosis Manual Light Duty Forward Control Chassis, Value Van, and Motorhome Chassis Models". The GM document number for the 1992 manual was X-9240. They are sometimes available on EBay
pick up a Chilton's manual it has that and alot more and for about 30 bucks its a must have
Wiring diagrams are often on the blower housing, or elecrical compartment. You didn't say whether you are looking for the unit diagram or heat kit diagram, which are considered seperate. If you are looking for the heat kit diagram, post the model number listed on the heat kit itself.
go to best buy or a car audio installation shop and buy a wiring harness (20-30 dollars) it it color coded and makes the job so much easier...
I ordered and received a complete color coded wiring diagram from ahdol (American automobile enthusiats dgital online library. It was around $30 and I am using it now. It seems to be accurate.
I dont have a diagram but this should help You will need a 4 pin relay (available at any spares shop). The pins are numbered 87- to fog lights 30- to battery positive with fuses inline 86- positive from parklights 85- earth thru switch
If you are having problems with the wiper motor, I have found that almost all the time the problems can be solved by replacing the wiper motor pulse board. This can be done without removing the wiper motor. Your local auto parts store will have a replacement pulse board for aprox $30.
AnswerA shop manual will usually contain a detailed witing diagram. I've had good luck with Haynes manuals the 1988-1989 Chilton repair manual c/k series wiring schematic shows a PINK wire from the windshield wiper switch to the windshield wiper motor and the black lead from the motor to groundif you have the manual see page 6-30
Check your fuses, most likely be a fuse. Otherwise check the continuity of the wiring. You will probably need a wiring diagram, visit an autoelectrician and ask if you can buy a copy of what you need. find ure fuel pump relay pull it .jump pin no 30 to 87 and pump shud sound if it does then ure relay is bad if it does not sound then try the fuse .
The connection wiring diagram is usually on the inside of the motor's junction box cover. If the motor has three wires at the junction box then these wires are connected to the three incoming supply wires. If there is more than three wires, check the motor's nameplate to see if the motor is a dual voltage motor.
Possible
You can't find it because it was not used on that year engine.
Things like that are a little hard to find for a 30 year old tractor.