CCKen

If #11 fuse in the JB blows the engine will stop. It's the power to the control coils of the ASD and Fuel Pump relays, and to the TCM and PCM.

It could be a fault in the TCM or related wiring. If you can, remove the connector from the TCM and see if the fuse blows when you put it in Drive. You'll have to manually shift the trans. You will get a Check Engine light but it will go away eventually.

Jayw32

I tried that and I'm still blowing a fuse....checked all the grounds I could see in the engine bay and the all looked good....wiring harness to the trans control module looks good as well as the wiring for the O2 sensors I have no idea what to check next...

67 GMC

You would need to remove the wiring harness from the TCU and then see if that solves your problem (you can't "see it"). The same for the grounds-you need to take off bolt, clean the contact surfaces with a wire brush to shiny and then put them back on.


You've most likely got a short to ground so have you changed any wiring (radio wiring, speaker wires etc) that may be hooked in. I think what you are describing is a slow short since it takes time to blow the fuse. Usually, you will blow them immediately is shorted to ground. This sounds like a wire that may be just touching something it's not supposed to.

freegdr

While sitting running shifter thru gears does fuse blow ? Check wiring to vss it moving the vehicle that blows the fuse . Check fuel pump wiring at tank .

freegdr

Does fuse 11 power torque convertor clutch solenoid ?

Fuse three in the power distribution center (PDC) supplies the ignition switch which in turn supplies fuse 11 behind the glove box.

Fuse 11 supplies this switched live to a number of circuits. The only one of the circuits likely to blow the fuse when a gear is selected is the Torque Converter Clutch Solenoid (TCCS) within the auto box.

A trouble code should cause the check engine light to come on if the computer is detecting a short in the TCCS. Cycle the ignition key On - Off - On - Off - On within 5 seconds. If a code has been stored from the fuses blowing it should show code 37 in the odometer. 55 means end of codes.

The connector for the TCCS is on the left side of the transmission somewhere and is black with two wires. Red/light green and orange/light green. Disconnect that plug and if the fuse doesn't blow the problem is the solenoid. In that case you'd need to change the solenoid pack. I think it's accessible by removing the auto oil pan, someone with an auto should be of more help there though.

67 GMC

Does it blow the fuse when you shift to R (Reverse) or D(DRIVE) or both? Do you have your foot on the brake when you're doing this? Need more specific information. I know blowing fuses is a pain but it's got to be something simple causing the issue but you'll have to run down a few things first to rule out various circuits or we can't help here. In my opinion, I can't see it being a bad NSS (neutral safety switch). You would have a no-start issue if that was bad (not a fuse blown).

CCKen

Do you have a fuse in the JB #10 fuse holder in your Jeep?

CCKen

Here's a diagram of the circuits powered throgh fuse #11.

The Transmission Range Switch is known as the NSS hereabouts..

There's not much to choose from to disconnect to try and isolate a defective unit and still run/drive your Jeep.

The Duty Cycle EVAP/Purge Solenoid could be disconnected. The PCM starts operating it around 150*F coolant temp.

CCKen

Here's your Transmission Range Switch (NSS) circuit.



The TRS wiring passes through a connector at the trans dipstick (see pic).

Verify that the wiring harness looms from these connectors that travel down to the transmission aren't chafed through to the wiring. Your TRS/NSS connector may be black. You're looking at a '99 configuration.

Darrell Reeves

Did you ever find out the problem, i have the same problem?

Bamaboy69

Check ground on engine block
May have to tighten it or move it and possibly clean it, that's your problem

jakeepoo3

Sounds like you need to bust out a multimeter and test light instead of unplugging everything and guessing. Check the TCM inputs and the circuit wiring for continuity and good grounds.

5-Speed

@TrailerTrash

67 GMC

The OP hasn't posted since 2014 so I think this thread is closed.

fhorta

I know this thread is closed, but I have same issue 91 cherokee. I have unplugged that nss plug and so far fuse has not blown after driving two miles. Before I didn't even get across the street before it blew.