CharlieS
GOLD Star
Okay, I'm questioning myself. Does the 80 have a 4 lo indicator in the dash? I think I might be confusing it with my 200 series - I'm almost positive the 200 has a 4lo indicator.
Why I'm asking: I was out on trail this weekend and noticed that no 4lo light is lighting up.
Research into the FSM and EWD don't show an indicator light for 4Lo.
Key on, not started or running, I don't have a 4lo dash light lit up - but I do have a bunch of others.
I guess it makes more sense to have an indicator in the 200 since the 4lo is electrical actuated and not a positive manual engagement.
It looks like the switch in the transfer case is called the "Transfer L4 Position SW"
(TRANSFER L4 POSITION)
WHEN THE TRANSFER SHIFT LEVER IS MOVED TO L4 POSITION, THE CENTER DIFF. IS LOCKED, THEN THE ABS IS NOT IN OPERATION AND THE ABS WARNING LIGHT IS LIGHTED UP.
Note this rig had the pin 7 mod long before I got it, so the CDL does not lock automatically in 4lo, and it also doesn't have anything ABS anymore (it had an ABS-ectomy). So I am not surprised to not get a CDL light or ABS light on the dash.
It also is a non-factory locked rig - it has ARB lockers not factory lockers, wired up by Slee, so used whatever setup they made to make the factory rotary switch work. I mention that because I don't think it has a factory diff lock control relay, and for that reason the EWD isn't 100% useful. Based only on the way it works, I don't think the Slee relay setup cares what position the transfer case is.
Looks like the switch comes in on the ECM at Pin 9, aka L4
6. TRANSFER SHIFT OPERATION
WHEN THE TRANSFER SHIFT LEVER IS MOVED TO L4 POSITION, A SIGNAL FROM TRANSFER L4 POSITION SW ISINPUT TO THE TERMINAL L4 OF THE ENGINE CONTROL MODULE, THEN SHIFT TO L4 OCCURS.
SERVICE HINTS
E4 (A), E5 (B), E6 (C), E7 (D) ENGINE CONTROL MODULE
L−GND :
7.5−14.0 VOLTS WITH THE SHIFT LEVER AT L POSITION
0−1.5 VOLTS WITH THE SHIFT LEVER AT EXCEPT L POSITION
(5) TRANSFER CONTROL SIGNAL
WHILE THE TRANSFER SHIFT LEVER IS IN L4 POSITION, THE CENTER DIFF. LOCK INDICATOR SW DETECTS A SIGNAL OF THE CENTER DIFF. LOCK AND THE SIGNAL IS INPUT TO TERMINAL EXI OF THE ABS ECU.
The Center Diff Lock light works, and it shares a fuse with this circuit, so it seems that teh fuse is probalby ok.
Looks like the circuit includes the switch in the transfer case, wires to the ECM, and then wires to the dash light bulb? Or is there more to it?
I replaced all my dash lights with new oem bulbs last spring and this has worked properly since then.
I did reseal the transfer about a year ago, and all the switches tested good at that time.
It sat most of the winter, and yesterday was the first time I've used 4lo since the late fall.
It mechanically goes into 4lo and works fine.
I tried "exercising" the lever back and forth a bunch hoping it would work any stickiness in the switch loose and no change.
Why I'm asking: I was out on trail this weekend and noticed that no 4lo light is lighting up.
Research into the FSM and EWD don't show an indicator light for 4Lo.
Key on, not started or running, I don't have a 4lo dash light lit up - but I do have a bunch of others.
I guess it makes more sense to have an indicator in the 200 since the 4lo is electrical actuated and not a positive manual engagement.
It looks like the switch in the transfer case is called the "Transfer L4 Position SW"
(TRANSFER L4 POSITION)
WHEN THE TRANSFER SHIFT LEVER IS MOVED TO L4 POSITION, THE CENTER DIFF. IS LOCKED, THEN THE ABS IS NOT IN OPERATION AND THE ABS WARNING LIGHT IS LIGHTED UP.
Note this rig had the pin 7 mod long before I got it, so the CDL does not lock automatically in 4lo, and it also doesn't have anything ABS anymore (it had an ABS-ectomy). So I am not surprised to not get a CDL light or ABS light on the dash.
It also is a non-factory locked rig - it has ARB lockers not factory lockers, wired up by Slee, so used whatever setup they made to make the factory rotary switch work. I mention that because I don't think it has a factory diff lock control relay, and for that reason the EWD isn't 100% useful. Based only on the way it works, I don't think the Slee relay setup cares what position the transfer case is.
Looks like the switch comes in on the ECM at Pin 9, aka L4
6. TRANSFER SHIFT OPERATION
WHEN THE TRANSFER SHIFT LEVER IS MOVED TO L4 POSITION, A SIGNAL FROM TRANSFER L4 POSITION SW ISINPUT TO THE TERMINAL L4 OF THE ENGINE CONTROL MODULE, THEN SHIFT TO L4 OCCURS.
SERVICE HINTS
E4 (A), E5 (B), E6 (C), E7 (D) ENGINE CONTROL MODULE
L−GND :
7.5−14.0 VOLTS WITH THE SHIFT LEVER AT L POSITION
0−1.5 VOLTS WITH THE SHIFT LEVER AT EXCEPT L POSITION
(5) TRANSFER CONTROL SIGNAL
WHILE THE TRANSFER SHIFT LEVER IS IN L4 POSITION, THE CENTER DIFF. LOCK INDICATOR SW DETECTS A SIGNAL OF THE CENTER DIFF. LOCK AND THE SIGNAL IS INPUT TO TERMINAL EXI OF THE ABS ECU.
The Center Diff Lock light works, and it shares a fuse with this circuit, so it seems that teh fuse is probalby ok.
Looks like the circuit includes the switch in the transfer case, wires to the ECM, and then wires to the dash light bulb? Or is there more to it?
I replaced all my dash lights with new oem bulbs last spring and this has worked properly since then.
I did reseal the transfer about a year ago, and all the switches tested good at that time.
It sat most of the winter, and yesterday was the first time I've used 4lo since the late fall.
It mechanically goes into 4lo and works fine.
I tried "exercising" the lever back and forth a bunch hoping it would work any stickiness in the switch loose and no change.
