The Pig Rig!

[1976gmc20]

Originally Posted by ericjon262

Cutting the wire will make the light go out, but probably not fix a problem.

try the quick stomp, I intentionally tripped it two or three times to make sure that the technique works. I made a quick video to illustrate how quick the jab is.

https://youtu.be/OJ9mrFhc5rw

The big flat module is probably the ABS Module, but I can't say for sure, I've never had an ABS equipped square.

Thanks for the tip! I will go out and try that shortly.

The 89 pickup isn't a square, but it looks to be the same setup as my 91 suburban (which is "newer" but yet "older" ). Only difference is the 91 has steel MC reservoir while the pickup is plastic. The suburban brakes are fine; I'm not sure if I've even replaced the pads in 18 years.

[ericjon262]

Originally Posted by 1976gmc20

Thanks for the tip! I will go out and try that shortly.

The 89 pickup isn't a square, but it looks to be the same setup as my 91 suburban (which is "newer" but yet "older" ). Only difference is the 91 has steel MC reservoir while the pickup is plastic. The suburban brakes are fine; I'm not sure if I've even replaced the pads in 18 years.

10-4, the connector for the light is removed, at least on the squarebodies, by squeezing the sides, if you squeeze them, and pull, and the light stays on, disconnect the switch at the parking brake. if it's still on, the wire could be shorted to ground somewhere, or the ABS module is lighting it up somehow.

[1976gmc20]

Originally Posted by 1976gmc20

Thanks for the tip! I will go out and try that shortly.

The 89 pickup isn't a square, but it looks to be the same setup as my 91 suburban (which is "newer" but yet "older" ). Only difference is the 91 has steel MC reservoir while the pickup is plastic. The suburban brakes are fine; I'm not sure if I've even replaced the pads in 18 years.

Okay, I tried the quick stomp as per the video several times and no success.

I finally got the wire pulled off, and the light is still flashing so it's apparently something else. Otherwise brakes work fine and fluid level is staying steady. The parking brake is disconnected because the arm in the LR was destroyed and I haven't yet gotten to a junkyard to try to find another one. The part isn't available new so the shop put it back together without either one. I have the RR parking brake arm in my glovebox.

I compared these two trucks again, the 1989 GMT400 and the 1991 squarebody. The brakes are basically the same and both apparently have the RWAL as there is another device that the rear brake line runs through that upon closer inspection has wires that connect to the flat module. Only difference other than the steel MC reservoir is that the 91 has the PV and RWAL devices mounted crossways under the MC and the 89 has them fore and aft.

If the RWAL works on either truck, it is undetectable when driving. Maybe I just never tried to stop that fast?

[ericjon262]

if I had to guess, then I would say it's probably the ABS module detecting some sort of failure and lighting up to signify it.

[1976gmc20]

Originally Posted by ericjon262

if I had to guess, then I would say it's probably the ABS module detecting some sort of failure and lighting up to signify it.

I would guess that you're a good guesser

// true grit fan

[ericjon262]

last night at work, I started working on a list of things I either need to do, or acquire for taking the Pig Rig on longer trips, like to Alaska and back

one of the major things I started with was spare parts, in this case, I looked for single point failure parts that disable the truck and can't be easily rigged up or bypassed to limp home on, and then added things that can make roadside "repairs" get you somewhere where a real repair can be completed.

Parts/materials:

IGN coil
IGN module
Belts
Fuel filter
JB weld
Zip ties
Bailing wire
Electrical wire/crimps/tape
RTV
tire plug kit

with the exception of the belts, I'm 99% sure all of that will fit into a single 7.62 ammo can, the belts might fit as well depending on how tight I can cram everything in.

but obviously, this is only half the picture, if you have parts, but no tools to install them, then you may as well not have the parts, so I'm also going to make up a tool list containing the tools necessary to install belts/coils/modules, as well as a few common wrench sizes and a small socket set, double covering common GM sizes like 3/8, 1/2, and 9/16.

on the other side of the field, I began looking at things I would like to add to make trails and trips more accommodating.

The truck has an AUX battery already, but I'm not sure what circuit triggers the solenoid to allow it to be put to use.
I need some means of adding pressure to the tires when getting off the trails
Recovery gear in in the event I get stuck, which is a whole topic by itself...
camping gear to include a means of cooking food and making coffee
a water supply
communications of some kind, I'm looking into signal boosters for cell phones.
animal control (bear spray and the like)
and a charging station for go-pros, phones, and the like.

I will elaborate more on how I plan to accomplish some of these ideas as I go.