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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

4x4 and low range indicator lights backwards

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Old Sep 17, 2017 | 11:21 PM
  #1  
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TCBdrive
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4x4 and low range indicator lights backwards

Recently picked up a 96 f250, manual trans, 4407 transfer case (manual shift) to haul some off-road toys. The low range light comes on in 4 wheel, and when shifted into low the 4x4 light comes on.
previous owner did a little hacking here and there i had to fix but havent pinned down this one. Any quick ideas of where to look?
 
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Old Sep 18, 2017 | 07:21 PM
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Red97350
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I'm thinking that there may be an issue with the switch on the transfer case.

Red
 
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Old Sep 18, 2017 | 10:38 PM
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jason90f150
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Make sure there is a washer between the sensor and the case
 
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Old Sep 18, 2017 | 11:27 PM
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Will do on the washer. I have plenty of sizes of aluminim drain / fill plug washers. Some reason i was thinking there was just an O-ring so ill see what it does.
am i right to assume the two wires to the switch, one is for each lamp?
 
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Old Sep 18, 2017 | 11:31 PM
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jason90f150
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Originally Posted by TCBdrive
Will do on the washer. I have plenty of sizes of aluminim drain / fill plug washers. Some reason i was thinking there was just an O-ring so ill see what it does.
am i right to assume the two wires to the switch, one is for each lamp?
The washer is more like a calibrated shim. I think it's a continuity switch one for H and one for 4Low.
 
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Old Sep 18, 2017 | 11:34 PM
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Originally Posted by jason90f150
The washer is more like a calibrated shim. I think it's a continuity switch one for H and one for 4Low.
Ok well ill try some different thickness washers i have. And see if any straighten it out. Not really a big deal but sometimes the simple things drive me nuts.
 
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Old Sep 19, 2017 | 12:06 AM
  #7  
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So before i get too in depth here, i found a plug farther up the harness that had a glob of silicone, and it turns out someone had the two switch wires reversed. Un-pinned them and fixed it right, now 4x4 is on in 4 hi and 4x4 and low range lights on in low.
i recently rebuilt the transfer case and somehow overlooked that hacked up plug.
Either way thanks for the pointers.
 
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