massacre
Elite Explorer
- Joined
- January 24, 2018
- Messages
- 1,010
- Reaction score
- 280
- City, State
- Massachusetts
- Year, Model & Trim Level
- ‘94 Explorer
‘19 Nautilus
Hello,
I bought some OEM heated mirrors for my 94. It did not have heated mirrors from the factory.
I did some searching on here and seems that the consensus is that the rear window defroster switch provides timed power to the mirrors.
In looking at my wiring diagram, it appears that there are 2 different fused circuits, 1 for defrost grid and 1 for mirrors, in Limited and EB models.
I need to dig further, as the heated mirror circuit has 540, 541, 542 circuits for the mirror motors, the non heated has these circuits too. Heated has 2 additional pins, 1 is 57 circuit(common ground circuit for door) and 1 is circuit 59 which is power to the heater pad.
The connectors are different, but it looks like an O2 sensor connector, which I have spares of. I can repin the door side of the mirror harness to match. I plan to tie the 57 ground circuit into the common ground of the door, and I have some extra pins somewhere and a crimp tool so that should not be too hard to accomplish. Choosing where to take the power from is the question.
In chasing the defrost grid circuit, I am finding circuit # 185 at the grid,which quickly changes to 186. This circuit travels through a few connectors until it reaches the defrost grid timer switch.
Manual shows that on the EB and Limited, as well as the other models, the connector at the defrost switch is exactly the same, with the exact same circuits. 5 wires, cuircuits are 19, 57, 298, 688, and 186 exact same between the Limited/EB and non Limited/EB. Even the wire colors are the same : LB/R, BK, P/O, GY/LB, BR/LB, respectively. Same wire gauge and everything.
So I guess i’m Looking at this switch and guessing that the factory wiring is a little different than I thought. I don’t have a limited to look at but I was chasing some other circuits and I did find a circuit that went up to the overhead console. Is the heated mirror switch located in the overhead console on the EB/Limiteds? I never had one so I have no idea.
What i’ll Prob end up doing is just going to my fuse box and seeing if that space is open where the limiteds get their power from, then feed both heated mirrors from that, but I would like a timed switch for that circuit. I don’t want to melt the defrost switch by putting the additional load of 2 heated mirrors, so maybe I can find a switch and just install it on the dash somewhere? To be honest I have a CDL so I never use the rear view mirror anyways. I could prob live with disconnecting the rear defrost grid at the switch and simply replace that with the mirrors.
I need to think on this some more but was wondering if anyone here has done this and how they handled it. Thanks for any feedback and have a nice day!
I bought some OEM heated mirrors for my 94. It did not have heated mirrors from the factory.
I did some searching on here and seems that the consensus is that the rear window defroster switch provides timed power to the mirrors.
In looking at my wiring diagram, it appears that there are 2 different fused circuits, 1 for defrost grid and 1 for mirrors, in Limited and EB models.
I need to dig further, as the heated mirror circuit has 540, 541, 542 circuits for the mirror motors, the non heated has these circuits too. Heated has 2 additional pins, 1 is 57 circuit(common ground circuit for door) and 1 is circuit 59 which is power to the heater pad.
The connectors are different, but it looks like an O2 sensor connector, which I have spares of. I can repin the door side of the mirror harness to match. I plan to tie the 57 ground circuit into the common ground of the door, and I have some extra pins somewhere and a crimp tool so that should not be too hard to accomplish. Choosing where to take the power from is the question.
In chasing the defrost grid circuit, I am finding circuit # 185 at the grid,which quickly changes to 186. This circuit travels through a few connectors until it reaches the defrost grid timer switch.
Manual shows that on the EB and Limited, as well as the other models, the connector at the defrost switch is exactly the same, with the exact same circuits. 5 wires, cuircuits are 19, 57, 298, 688, and 186 exact same between the Limited/EB and non Limited/EB. Even the wire colors are the same : LB/R, BK, P/O, GY/LB, BR/LB, respectively. Same wire gauge and everything.
So I guess i’m Looking at this switch and guessing that the factory wiring is a little different than I thought. I don’t have a limited to look at but I was chasing some other circuits and I did find a circuit that went up to the overhead console. Is the heated mirror switch located in the overhead console on the EB/Limiteds? I never had one so I have no idea.
What i’ll Prob end up doing is just going to my fuse box and seeing if that space is open where the limiteds get their power from, then feed both heated mirrors from that, but I would like a timed switch for that circuit. I don’t want to melt the defrost switch by putting the additional load of 2 heated mirrors, so maybe I can find a switch and just install it on the dash somewhere? To be honest I have a CDL so I never use the rear view mirror anyways. I could prob live with disconnecting the rear defrost grid at the switch and simply replace that with the mirrors.
I need to think on this some more but was wondering if anyone here has done this and how they handled it. Thanks for any feedback and have a nice day!