wsucougarx
Well-known member
- 6,951
- 67
- 48
- Location
- Washington State
Troubleshooting Day....
Ok today and most of yesterday was dedicated to troubleshooting. Top of the agenda was finding out why my Parking Brake Light/Alarm wouldn't shut off, why my truck won't shift into Lo/Hi Range with 120 PSI in the system, and lastly why my front axle wouldn't engage.
The parking brake issue turned out to be a disconnected wire...whew!
The next issue was the transfer case switch/lever. For some reason, I couldn't get my truck to shift from Hi/Lo Range while the truck was at 120 PSI (running or not running). I was only able to shift the transfer case once the air pressure was way down or completely drained from the tank. My attention was then focused on that little button at the end of the lever...what the heck is that thing for? I went inside and pulled the TM to find out about the system. Hmm, it says you suppose to push in the button to swith the transfer case. Uh yah, it didn't work. My thoughts were a faulty switch once again. Then it dawned on me, why not crawl under the truck to see if there's another dangling wire. Hmm, there was another wire spotted that wasn't mated to anything. Later I found it was the capacitor. Both the wires from the transfer case lever switch enter at opposite ends of the this capacitor. Looking up at the unit I saw where the two transfer case wire's came out of the cab. One wire went to the capacitor and the other one went directly to the transmission 5th gear lock out unit. I went inside and saw that it was indeed wired incorrectly...no surprise. Further investigation revealed many wires were just connected randomly...what the heck!!! I copied the wire numbers down, went inside and did my homework.
Once I got the wires figured out, I wired them to the appropriate places. I jumped in the cab and just turned on the battery switch. Holding my breath I grabbed the transfer case lever and pushed in the button.....CLICK! I head an audible click from the rear of the truck. OK, now the transfer case interlock is receiving juice. Now the big test, started the truck and VIOLA!! She now shifts smoothly at 120 PSI.
Now my attention was on the front wheel drive enagement. I got the air pressure upto 120 PSI, turned off the truck and flipped the airshift lever in the cab. Crawled to the back of the transfer case and cracked open the air line leading to the airshift piston. It was getting air...hmmm. I then crawled back in the cab and shut the switch off. Went back to the transfer case, cracked the air line and no air. Ok now I ruled out a faulty air valve just forward of the transfer case. Now I was confused. I'm now thinking it was a stuck air shift pistion. I went to crawl out and decided to trip the Lo range air valve and heard air. I then put my hand on the driveshaft and hand rotated it and CLICK! Oh, I didn't even think about rotating the shaft to seat the air shift piston....oops. That was 6 hours of troubleshooting wasted on something as simple as common sense...LOL. Lessons learned!!
Oh and another thing that got fixed today was the parking brake. Couldn't figure out why there was no resistance in the handle when in the upright position. I crawled back to find the lock nut was gone. In fact, the cable was just dangling there. Luckily, the remedy was just a locknut and washer.
Projects Completed:
-Parking Brake Light/Alarm fixed
-Transfer Case switching fixed at 120 PSI
-Parking brake operational now
-Mounted a ring mount bracket on the passenger side of truck
Pics:
1- The reason my truck wouldn't shift from Hi/Lo Range. Dangling wire from the capacitor.
2- Interlock on the transfer case
3- Air shift unit
Ok today and most of yesterday was dedicated to troubleshooting. Top of the agenda was finding out why my Parking Brake Light/Alarm wouldn't shut off, why my truck won't shift into Lo/Hi Range with 120 PSI in the system, and lastly why my front axle wouldn't engage.
The parking brake issue turned out to be a disconnected wire...whew!
The next issue was the transfer case switch/lever. For some reason, I couldn't get my truck to shift from Hi/Lo Range while the truck was at 120 PSI (running or not running). I was only able to shift the transfer case once the air pressure was way down or completely drained from the tank. My attention was then focused on that little button at the end of the lever...what the heck is that thing for? I went inside and pulled the TM to find out about the system. Hmm, it says you suppose to push in the button to swith the transfer case. Uh yah, it didn't work. My thoughts were a faulty switch once again. Then it dawned on me, why not crawl under the truck to see if there's another dangling wire. Hmm, there was another wire spotted that wasn't mated to anything. Later I found it was the capacitor. Both the wires from the transfer case lever switch enter at opposite ends of the this capacitor. Looking up at the unit I saw where the two transfer case wire's came out of the cab. One wire went to the capacitor and the other one went directly to the transmission 5th gear lock out unit. I went inside and saw that it was indeed wired incorrectly...no surprise. Further investigation revealed many wires were just connected randomly...what the heck!!! I copied the wire numbers down, went inside and did my homework.
Once I got the wires figured out, I wired them to the appropriate places. I jumped in the cab and just turned on the battery switch. Holding my breath I grabbed the transfer case lever and pushed in the button.....CLICK! I head an audible click from the rear of the truck. OK, now the transfer case interlock is receiving juice. Now the big test, started the truck and VIOLA!! She now shifts smoothly at 120 PSI.
Now my attention was on the front wheel drive enagement. I got the air pressure upto 120 PSI, turned off the truck and flipped the airshift lever in the cab. Crawled to the back of the transfer case and cracked open the air line leading to the airshift piston. It was getting air...hmmm. I then crawled back in the cab and shut the switch off. Went back to the transfer case, cracked the air line and no air. Ok now I ruled out a faulty air valve just forward of the transfer case. Now I was confused. I'm now thinking it was a stuck air shift pistion. I went to crawl out and decided to trip the Lo range air valve and heard air. I then put my hand on the driveshaft and hand rotated it and CLICK! Oh, I didn't even think about rotating the shaft to seat the air shift piston....oops. That was 6 hours of troubleshooting wasted on something as simple as common sense...LOL. Lessons learned!!
Oh and another thing that got fixed today was the parking brake. Couldn't figure out why there was no resistance in the handle when in the upright position. I crawled back to find the lock nut was gone. In fact, the cable was just dangling there. Luckily, the remedy was just a locknut and washer.
Projects Completed:
-Parking Brake Light/Alarm fixed
-Transfer Case switching fixed at 120 PSI
-Parking brake operational now
-Mounted a ring mount bracket on the passenger side of truck
Pics:
1- The reason my truck wouldn't shift from Hi/Lo Range. Dangling wire from the capacitor.
2- Interlock on the transfer case
3- Air shift unit
Attachments
-
73.3 KB Views: 72
-
74.9 KB Views: 74
-
79.4 KB Views: 76
Last edited: