Nutro
1/2 ton status
I'm used to newer vehicles and haven't owned or worked on an older vehicle in a while so I am learning a lot in my 40's.
I just bought an 88 K5 and it needs a lot of undoing of crap that previous owners have done to it. I'm trying to attack it in groups.
1. Dash wiring including a non-op radio. I think I've fixed that now.
2. A/C and Heat. I'm working on this now.
3. Removing cheap dangerous lift and installing a lower safer lift.
4. Cosmetics.
So back to #2.
On the dash I had NOTHING. No fan speed, high or low. Nothing. On a hunch I replaced the mode selector switch and still nothing. I got a new blow motor resistor and installed it today. Bam! I have fan speeds. Not much on the blend door. I found the vaccum unhooked so I ran a new line to the intake manifold source. I now have defroster and floor blowing hard. Not much out of vents so I will address that under the dash later hopefully.
I was out there with the fan on high and all of a sudden everything turned off and went silent. My pops touched the large purple wire going from the A/C relay on heater box to the blower motor. When he touched that wire, it came back on. I walked over and started fiddling with it. I can move the wire at the relay and the blower motor connection and it will interrupt the fan blowing.
At one point while re-connecting the wire to the blower motor I heard an arc or spark sound like a pop but it was still working. My question is this: If this wire is bad or the connectors at the relay and blower motor are bad, would this be a failed part at that source or could it be a ground or hot wire elsewhere? Electrical is not my forte.
I looked and they don't make or sell that connector new and there are no squares in junk yards near me. Should I replace that blower motor relay on the heater box? I can maybe de-pin at the relay and run a new 10ga(?) wire from the relay to the blower motor?
I just bought an 88 K5 and it needs a lot of undoing of crap that previous owners have done to it. I'm trying to attack it in groups.
1. Dash wiring including a non-op radio. I think I've fixed that now.
2. A/C and Heat. I'm working on this now.
3. Removing cheap dangerous lift and installing a lower safer lift.
4. Cosmetics.
So back to #2.
On the dash I had NOTHING. No fan speed, high or low. Nothing. On a hunch I replaced the mode selector switch and still nothing. I got a new blow motor resistor and installed it today. Bam! I have fan speeds. Not much on the blend door. I found the vaccum unhooked so I ran a new line to the intake manifold source. I now have defroster and floor blowing hard. Not much out of vents so I will address that under the dash later hopefully.
I was out there with the fan on high and all of a sudden everything turned off and went silent. My pops touched the large purple wire going from the A/C relay on heater box to the blower motor. When he touched that wire, it came back on. I walked over and started fiddling with it. I can move the wire at the relay and the blower motor connection and it will interrupt the fan blowing.
At one point while re-connecting the wire to the blower motor I heard an arc or spark sound like a pop but it was still working. My question is this: If this wire is bad or the connectors at the relay and blower motor are bad, would this be a failed part at that source or could it be a ground or hot wire elsewhere? Electrical is not my forte.
I looked and they don't make or sell that connector new and there are no squares in junk yards near me. Should I replace that blower motor relay on the heater box? I can maybe de-pin at the relay and run a new 10ga(?) wire from the relay to the blower motor?
