gdubya Posted April 12, 2020 Share Posted April 12, 2020 Need some help. The pass side courtesy lamp is spliced into the driver side lamp and then someone added a connector to plug it into the fuse panel. This cannot be correct. Wiring diagrams show both coming from the splice behind the instrument panel. Picture attached. The rear Defog is throwing me for a loop. The purple wire goes to the trunk as expected but coming off the switch is the inline fuse and two connectors. The male one was plugged into an orange wire behind the ac controls that I traced back to the splice behind the IP. The female end was not connected to anything. I thought the defog was plugged into the fuse box but the connector is wrong. Is the orange wire supposed to be for the courtesy lamps? Pic attached. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 12, 2020 Share Posted April 12, 2020 That does not look exactly like it did from the factory, but it will work. The orange wires from the courtesy lights on the driver and passenger side should go into the blue female connector as you said. From the factory there would have been a short orange wire with a male connector on it like the red wire for the defogger has. Plug that blue female connector into the fuse box in the Bat. position. Slide it over the made spade in the fuse box. The red power wire for the defogger goes in the ignition position, which is two spots down from where you just plugged in the courtesy light power wire. The extra plug on each of those wires is in case you have more power options to plug in. There are only so many spaces on the fuse block. Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 12, 2020 Author Share Posted April 12, 2020 Thanks Red The defog wire was originally plugged into an orange wire behind the ac controls and not into the fuse box. Is that the short orange wire you are talking about? I think that is where the original courtesy lamps may have plugged into. If that is the case, where can I find replacement connectors? Not sure the connector on the defog will plug in as it is a different style of connector. Not sure the defog harness is original to the car or not. It was built with rear defog but not sure of originality. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 13, 2020 Share Posted April 13, 2020 All the orange wires that have connectors on them in your dash harness are constant hot wires. Meaning that they draw right from the battery. This would include your clock wire, cigarette lighter wire and glove box light wire. These are all orange in color. You have a battery spot in your fuse block that is marked BAT. Plug that blue connector with the orange wire into the BAT location. It should fit there. Now if your door jamb switch wires are tied in with those white wires on your courtesy lights and you plug that blue connector in the BAT location your courtesy lights should go on when you open one or both of your cars doors. Be sure the bulbs are in working condition. Now if you plug that black connector for the defogger in the Ignition location, which is marked IGN, and you have the rest of the defogger wiring correctly run, your defogger will most likely work. Do not forget the ground on the defogger motor. Be sure the fuse is good. Just for sheets and giggles please try my suggestions. I am trying to help you. Your courtesy light wires have been messed with and most likely were not plugged in where they were supposed to be from GM. Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 13, 2020 Author Share Posted April 13, 2020 Thanks again Red. The courtesy lamps were originally plugged into the fuse box as you described and they worked. Looking at how it was wired I could tell it wasn’t factory correct. Looking at the wiring diagrams, in an original car it appears the lamps are fed from an orange wire from the dash harness you describe. I found an orange wire with a connector at the end. Do you think the lamps feed from this in an original set up? Why does the defog have a pigtail connector? When I found the car the defog was plugged into the orange wire I described above but I agree it should go into the panel because you only want it hot with key on. I have power to the fan only in Hi and not in Low plus I think the motor is shot. The motor is grounded. Perhaps motor is shot. Going to pull out and bench test Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 14, 2020 Share Posted April 14, 2020 If the motor runs, it is not shot. The switch controls the high and low speed. The pigtails were if you had another power option that needed power. You would then tie into power there. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 14, 2020 Share Posted April 14, 2020 Post a picture of the orange wire you are talking about. I should be able to identify it. Please show the connector on the end of it. To my knowledge the orange wire should be plugged into the fuse box in the BAT position. This is the way that I have seen them from the factory. Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 16, 2020 Author Share Posted April 16, 2020 Red, I cannot thank you enough. Here are some pics of the connector. Not easy to get a good pic of location. It comes off the harness and drops down below the radio. looking at the wiring diagram I feel like it is supposed to feed the courtesy lamps but not really sure. Any ideas on what it would plug into it? Quote Link to comment Share on other sites More sharing options...
cbolt Posted April 17, 2020 Share Posted April 17, 2020 Based on the location I would guess it feeds the console in console cars. When I added my console I had to tie the console harness into the factory plug, and that little guy looks familiar. Why not use a test light and see when the connector has voltage? Or if you don't have power available you could read it back to the fuse block to put yourself in the ballpark at least. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 17, 2020 Share Posted April 17, 2020 That single orange wire is not for a console. I can see the correct black connector for a console in that picture. It is the connector with the orange, gray and white wire in it. The console connector is just below the single orange wire and to the right. 1 Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 17, 2020 Author Share Posted April 17, 2020 Red you beat me to it. Any idea about the singe orange wire? If you need a better picture let me know. It is not an easy spot to get to. I traced it up into the main wiring harness where it heads back towards to driver's side and then dips back towards the fuse block (I believe). 1 Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 17, 2020 Share Posted April 17, 2020 That single orange looks exactly like the orange used for the clock, if one was ordered from GM. Do you already have a wire to your clock if your car has one? Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 17, 2020 Author Share Posted April 17, 2020 Yup! It was for the clock. Although the clock doesn’t work but at least that mystery is solved. Sorry to keep asking questions but not sure what this is either. Only gray wire in the wiring diagram is for the panel lamps and I don’t see it splitting. In the pic two gray wires come from the Acc slot in the panel and then one goes up perhaps to the dash lights. The second goes into a weird connector extension/converter where it turns to a red wire. Quote Link to comment Share on other sites More sharing options...
1970mcss Posted April 17, 2020 Share Posted April 17, 2020 I looked at the wiring diagram in electrical that Rob posted and it looks like the 20gy wire runs to the radio and I think the light switch. Maybe someone can double check me on that. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 18, 2020 Share Posted April 18, 2020 That gray wire would be power for a rear view mirror with a map light. I would have to bet that you have a rear view mirror with a map light. Do you? Any more wiring questions? That Pink looking wire is from another power accessory that your car has. What other power options do you have? Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 18, 2020 Share Posted April 18, 2020 That gray wire does not turn into the pink wire, The pink wire is just getting it's power from the same location as the gray wire. Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 18, 2020 Share Posted April 18, 2020 The gray wire for the lamps is in a fused location in the fuse block. Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 18, 2020 Author Share Posted April 18, 2020 Red Thanks again for your help. I have power windows and locks so I would bet it is one of those. I will trace it down if need be. Just waiting on my radio harness to arrive so I can put her back together. Meanwhile, I will need to do some cleanup of the previous owners wiring hatchet job and work on the defog motor. Appreciate your help, GW Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 18, 2020 Share Posted April 18, 2020 If your defog motor runs fine, then the motor is alright. Your switch controls the high and low speed. Your switch may be bad. Quote Link to comment Share on other sites More sharing options...
gdubya Posted April 18, 2020 Author Share Posted April 18, 2020 The ground was off the motor but even after I grounded it it didn’t work. Getting power to motor but only in Hi position. Nothing in Low. hopefully get out there tomorrow to do more digging. Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted April 18, 2020 Share Posted April 18, 2020 If only hi works on the blower motor check/change the blower resistor. 9 out of 10 times it's the resistor. Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted April 18, 2020 Share Posted April 18, 2020 I had the exact same problem. I did replace the blower motor resistor. I agree with Thomas F, 9 out of 10 times that would be the cause. BUT. in my case it was not the blower resistor, it was the blower switch itself. Once I took the switch out and was able to take it apart and look at it i cold see the damage. rob Quote Link to comment Share on other sites More sharing options...
RealRed70 Posted April 19, 2020 Share Posted April 19, 2020 As stated already, your blower motor is fine. The problem is in the switch. As stated before either the resistor or the switch itself is bad. Quote Link to comment Share on other sites More sharing options...
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