Diagnosing no 4wd
A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know
it's the wiring harness or the actuator, but does anyone have any diagnostic tips to isolate which one it is? Heck, the light could be a bad bulb.... But I put his jeep in 4 and it's definatly not engaging. Nick -- http://members.cox.net/nnote/ |
Re: Diagnosing no 4wd
Trouble shooting guide:
http://www.4x4posi-lok.com/PDFs/TSG_jeep.pdf Steve http://xjeep.dyndns.org Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? |
Re: Diagnosing no 4wd
Trouble shooting guide:
http://www.4x4posi-lok.com/PDFs/TSG_jeep.pdf Steve http://xjeep.dyndns.org Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? |
Re: Diagnosing no 4wd
Trouble shooting guide:
http://www.4x4posi-lok.com/PDFs/TSG_jeep.pdf Steve http://xjeep.dyndns.org Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? |
Re: Diagnosing no 4wd
Usually that just means the vacuum connection fell off the front axle.
That would be the first place I would look anyway. The second place is where the vacuum line passes the exhaust on it's way to the t-case. I have seen a few touch there and melt. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Nick wrote: > > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? Heck, the light could be a bad bulb.... > But I put his jeep in 4 and it's definatly not engaging. > Nick > > -- > http://members.cox.net/nnote/ |
Re: Diagnosing no 4wd
Usually that just means the vacuum connection fell off the front axle.
That would be the first place I would look anyway. The second place is where the vacuum line passes the exhaust on it's way to the t-case. I have seen a few touch there and melt. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Nick wrote: > > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? Heck, the light could be a bad bulb.... > But I put his jeep in 4 and it's definatly not engaging. > Nick > > -- > http://members.cox.net/nnote/ |
Re: Diagnosing no 4wd
Usually that just means the vacuum connection fell off the front axle.
That would be the first place I would look anyway. The second place is where the vacuum line passes the exhaust on it's way to the t-case. I have seen a few touch there and melt. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Nick wrote: > > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I know > it's the wiring harness or the actuator, but does anyone have any diagnostic > tips to isolate which one it is? Heck, the light could be a bad bulb.... > But I put his jeep in 4 and it's definatly not engaging. > Nick > > -- > http://members.cox.net/nnote/ |
Re: Diagnosing no 4wd
Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I > know it's the wiring harness or the actuator, but does anyone have > any diagnostic tips to isolate which one it is? Heck, the light > could be a bad bulb.... But I put his jeep in 4 and it's definatly > not engaging. > Nick Not sure if the vacuum harness for the '91 runs under the battery tray or not. If so, it may be eaten up by acid. |
Re: Diagnosing no 4wd
Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I > know it's the wiring harness or the actuator, but does anyone have > any diagnostic tips to isolate which one it is? Heck, the light > could be a bad bulb.... But I put his jeep in 4 and it's definatly > not engaging. > Nick Not sure if the vacuum harness for the '91 runs under the battery tray or not. If so, it may be eaten up by acid. |
Re: Diagnosing no 4wd
Nick wrote: > A friend has a 91yj 4.0 currently with no 4wd, not even the light. I > know it's the wiring harness or the actuator, but does anyone have > any diagnostic tips to isolate which one it is? Heck, the light > could be a bad bulb.... But I put his jeep in 4 and it's definatly > not engaging. > Nick Not sure if the vacuum harness for the '91 runs under the battery tray or not. If so, it may be eaten up by acid. |
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