4Hi and 4Hi-Lock switching question
#11
That bulb won't get hot enough to melt anything let alone a circuit board.
Do yourself a favor and buy a replacement switch panel and put it in. It will save you time, $ and frustration in the long run.
Do yourself a favor and buy a replacement switch panel and put it in. It will save you time, $ and frustration in the long run.
#13
I have a somewhat similar issue, BUT my normal 60/40 AWD is working but when I try 4 hi lock the button does not blink, nor does 4 hi lock engage. No CEL on or anything. Any thread suggestions or advice on any of our issues? 4 Lo works just fine. 4 hi is the only one not working. No idea. If the transfer case motor is bad would it still make it to 4 Lo just fine? I may try what IllusionX did. Way to go finding the problem. I hope that is what happened to mine, instead of something more serious.
#15
No.. well yeah i tried pushing the rear-diff lock button, but it doesn't light up. Eitherway, i don't need it for now anyways.. Old tires are dry rotting, so will have to have that changed first.
When I took pocession of the car, it was in 4Hi-lock and i couldn't shift out of it, so turns out the buttons kind of melted a little due to the heat of the light bulb right next to it. Is this a common issue?
Now that I finally got out of the 4lock... I have to read up on the maintenance schedule.
When I took pocession of the car, it was in 4Hi-lock and i couldn't shift out of it, so turns out the buttons kind of melted a little due to the heat of the light bulb right next to it. Is this a common issue?
Now that I finally got out of the 4lock... I have to read up on the maintenance schedule.
Tainter is right and replacing that board is good advice... there is no way those bulbs are capable of melting anything unless there is a larger electrical problem occurring. As far as the functionality of the different 4WD Lock modes, I suspect that your control panel looks like this (or at least it did before you took it apart... ):
If this is the case, then head over to Hummerdotcom and go to the Owner Resources page (Vehicle Owner?s Manuals | HUMMER). Grab a copy of the Owners Manual and the Getting To Know Guide. That button you were asking about on the right hand side is your rear differential lock... it can only be engaged once the vehicle is in 4 Lo Lock. As far as what state of motion the vehicle needs to be in prior to engaging any of those modes, it is detailed in both the Manual and the Guide:
When shifting between Four-Wheel
High and Four-Wheel-High Lock, you
must be traveling less than 75 mph
(120 km/h). To shift, press the desired
button. The indicator light will flash
while shifting. The light will continue
to flash if your speed is above 75 mph
(120 km/h), indicating the shift has
not occurred. The light will remain lit
when the shift is complete. Neutral is
used only when towing the vehicle.
When shifting into or out of Four-
Wheel-Low Lock, the vehicle must
be stopped or moving less than
3 mph (5 km/h) with the transmission
in Neutral.
Note: Operating your vehicle in Four-
Wheel-Low Lock above 30 mph (48
km/h) for any extended period of time
could cause damage to the transfer
case. Do not operate your vehicle in
Four-Wheel-Low Lock above 30 mph
(48 km/h) for extended periods.
High and Four-Wheel-High Lock, you
must be traveling less than 75 mph
(120 km/h). To shift, press the desired
button. The indicator light will flash
while shifting. The light will continue
to flash if your speed is above 75 mph
(120 km/h), indicating the shift has
not occurred. The light will remain lit
when the shift is complete. Neutral is
used only when towing the vehicle.
When shifting into or out of Four-
Wheel-Low Lock, the vehicle must
be stopped or moving less than
3 mph (5 km/h) with the transmission
in Neutral.
Note: Operating your vehicle in Four-
Wheel-Low Lock above 30 mph (48
km/h) for any extended period of time
could cause damage to the transfer
case. Do not operate your vehicle in
Four-Wheel-Low Lock above 30 mph
(48 km/h) for extended periods.
Last edited by ProphetPVD; 03-31-2015 at 12:16 PM.
#16
You, sir, are a useless addition to this forum. Please sell your hummer, and then move along to another forum.
@ the OP: as has been stated, those tiny LEDs dont get hot enough to melt anything. If your circuit board/buttons have melted then you have an electrical problem elsewhere in that circuit. If your dash is still taken apart, try tracing all the wires going into that circuit board and see if you can find a short or frayed/damaged wire that might be causing a problem. Could be something you can fix with some electrical tape.
Good luck, let us know what happens.
@ the OP: as has been stated, those tiny LEDs dont get hot enough to melt anything. If your circuit board/buttons have melted then you have an electrical problem elsewhere in that circuit. If your dash is still taken apart, try tracing all the wires going into that circuit board and see if you can find a short or frayed/damaged wire that might be causing a problem. Could be something you can fix with some electrical tape.
Good luck, let us know what happens.
#17
I have a somewhat similar issue, BUT my normal 60/40 AWD is working but when I try 4 hi lock the button does not blink, nor does 4 hi lock engage. No CEL on or anything. Any thread suggestions or advice on any of our issues? 4 Lo works just fine. 4 hi is the only one not working. No idea. If the transfer case motor is bad would it still make it to 4 Lo just fine? I may try what IllusionX did. Way to go finding the problem. I hope that is what happened to mine, instead of something more serious.
Good Luck
#18
You, sir, are a useless addition to this forum. Please sell your hummer, and then move along to another forum.
@ the OP: as has been stated, those tiny LEDs dont get hot enough to melt anything. If your circuit board/buttons have melted then you have an electrical problem elsewhere in that circuit. If your dash is still taken apart, try tracing all the wires going into that circuit board and see if you can find a short or frayed/damaged wire that might be causing a problem. Could be something you can fix with some electrical tape.
Good luck, let us know what happens.
@ the OP: as has been stated, those tiny LEDs dont get hot enough to melt anything. If your circuit board/buttons have melted then you have an electrical problem elsewhere in that circuit. If your dash is still taken apart, try tracing all the wires going into that circuit board and see if you can find a short or frayed/damaged wire that might be causing a problem. Could be something you can fix with some electrical tape.
Good luck, let us know what happens.
Eitherway, it is fixed for me, and works.
For the record, if anyone having issues with any of their buttons, either the button on the board has broken down, or the plastic keys are not able to push far down anymore to push the button on the circuit board. Testing it taken apart like I did will confirm the problem.
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