So I have a 1999 Yukon SLT I bought used. I'm having 3 electrical problems with it that are most likely not related but I figure I'd pour it all out in case one might cause the other. Let me preface this by saying I am not a mechanic. I'm not even a vehicle hobbyist. It's just my daily driver and I'd like to be able to fix it.
So problem 1: My headlights stay on at all times whenever the truck is running. My headlight switch only turns the running lights and the dash lights on and off. When I turn the switch on at night to see my dash, my back driver side tail light assembly (the entire thing) stops working. If I turn the switch back off all of the lights work fine, but my headlights remain on.
Problem 2: My Heat and air began working intermittently and only on the highest setting. Even then, when it would be very cold or very warm, it would stop working. As I drove for a while, it would randomly start working again. I did a little research and saw that it was most likely the blower motor resistor. I went to O'Reillys this morning and bought a replacement as my air would not blow at all today, and installed it about 2 hours ago. I made sure the harnesses were connected after installation and started my truck up with nothing. When I get moving, air can be felt coming from the vents but it's VERY VERY weak regardless of what setting its on. The people who owner the SUV before me had obviously encountered some issue before because when I took the glovebox off, the mount holding the relay wasn't even bolted in place. I was just laying on top of everything. I watched a how to video from 1aAuto on how to replace the resistor (they showed a '97 Tahoe) and they showed 3 wiring harnesses where I only had 2. I don't know if that's normal or not considering they're different year and models. But this is by far the most important problem that needs addressed. I can live without AC. I need heat in the winter time though.
Problem 3: My driver side power window wont go down at random times. Other times I'll be putting it up and it stops halfway up. I assume this is just a short in the switch, but I figured I'd throw it up here just in case.
I apologize if these issues have been addressed before but I'm at my wits end with this HVAC issue. Any help is much appreciated.
So problem 1: My headlights stay on at all times whenever the truck is running. My headlight switch only turns the running lights and the dash lights on and off. When I turn the switch on at night to see my dash, my back driver side tail light assembly (the entire thing) stops working. If I turn the switch back off all of the lights work fine, but my headlights remain on.
Problem 2: My Heat and air began working intermittently and only on the highest setting. Even then, when it would be very cold or very warm, it would stop working. As I drove for a while, it would randomly start working again. I did a little research and saw that it was most likely the blower motor resistor. I went to O'Reillys this morning and bought a replacement as my air would not blow at all today, and installed it about 2 hours ago. I made sure the harnesses were connected after installation and started my truck up with nothing. When I get moving, air can be felt coming from the vents but it's VERY VERY weak regardless of what setting its on. The people who owner the SUV before me had obviously encountered some issue before because when I took the glovebox off, the mount holding the relay wasn't even bolted in place. I was just laying on top of everything. I watched a how to video from 1aAuto on how to replace the resistor (they showed a '97 Tahoe) and they showed 3 wiring harnesses where I only had 2. I don't know if that's normal or not considering they're different year and models. But this is by far the most important problem that needs addressed. I can live without AC. I need heat in the winter time though.
Problem 3: My driver side power window wont go down at random times. Other times I'll be putting it up and it stops halfway up. I assume this is just a short in the switch, but I figured I'd throw it up here just in case.
I apologize if these issues have been addressed before but I'm at my wits end with this HVAC issue. Any help is much appreciated.