Attention: TDR Forum Junkies 
Just finished installing a PacBrake (vacuum) on my '99 CTD with ATS transmission and "Commander" control module. I am very satisfied with the combination and how well they work together. The Brake doesn't do much without the torque converted locked-up, which is where the "Commander" module comes in.
As for the installation, I spent some time trying to find a convienent place for the Dash switch to avoid cutting a hole in the dash. Since I don't use the ashtray, except for my CB mike, I chose to mount the switch in the front of the plate at the top of the ashtray (see enclosed picture). When the plate is removed there are plenty of openings to easily feed the wires through, including the fuse holder that is part of the PacBrake switch harness. To use this location I had to replace the supplied toggle switch with a RadioShack lighted rocker switch model 275-712, which has a round terminal base that fits into the dash opening behind the plate. The ashtray light had to be removed to avoid touching the switch contacts. With this switch the ashtray door can be closed without interference. The only non-issue is that when the drive selector is in Drive I cannot see the lighted switch without cocking my head a little.
The instructions said that inorder to access the ECM to install the wire from the "Commander" module you had to remove the fuel filter housing bolts and move it out of the way, but there is no way that's going to happen on a '99. The fuel filter has to be removed to gain access, and then it's an ordeal to get the wire into pin #20 of the ECM. As a side note, after replacing the fuel filter I was surprised that I didn't have to cycle the fuel pump at all to start her up. It just started right up and didn't miss a beat. It must have been the extra fuel I added to the filter before reinstalling it. I can hear a little hiss from the brake when it's on, but it sounds great, at least on the inside, when letting off of it from high RPMs.
At the same time I added a Power Edge EZ module and I love that too. It gives me an extra 7 lbs of boost. The next thing I have to do is to figure out how to keep my first intercooler hose from popping off. It did it three times this last summer while towing. Anyway, now I have both power and braking to run the mountains in my new 5th whl, which comes next.
As for the installation, I spent some time trying to find a convienent place for the Dash switch to avoid cutting a hole in the dash. Since I don't use the ashtray, except for my CB mike, I chose to mount the switch in the front of the plate at the top of the ashtray (see enclosed picture). When the plate is removed there are plenty of openings to easily feed the wires through, including the fuse holder that is part of the PacBrake switch harness. To use this location I had to replace the supplied toggle switch with a RadioShack lighted rocker switch model 275-712, which has a round terminal base that fits into the dash opening behind the plate. The ashtray light had to be removed to avoid touching the switch contacts. With this switch the ashtray door can be closed without interference. The only non-issue is that when the drive selector is in Drive I cannot see the lighted switch without cocking my head a little.
The instructions said that inorder to access the ECM to install the wire from the "Commander" module you had to remove the fuel filter housing bolts and move it out of the way, but there is no way that's going to happen on a '99. The fuel filter has to be removed to gain access, and then it's an ordeal to get the wire into pin #20 of the ECM. As a side note, after replacing the fuel filter I was surprised that I didn't have to cycle the fuel pump at all to start her up. It just started right up and didn't miss a beat. It must have been the extra fuel I added to the filter before reinstalling it. I can hear a little hiss from the brake when it's on, but it sounds great, at least on the inside, when letting off of it from high RPMs.
At the same time I added a Power Edge EZ module and I love that too. It gives me an extra 7 lbs of boost. The next thing I have to do is to figure out how to keep my first intercooler hose from popping off. It did it three times this last summer while towing. Anyway, now I have both power and braking to run the mountains in my new 5th whl, which comes next.
