Gap tool lift, larger tires, and access mode

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Mar 3, 2020 | 10:06 AM

#11

RickyN29

Three Wheeling

Joined: Apr 2018

Posts: 93

Likes: 13

Quote:

Originally Posted by rh32

Perfect, thanks for the input there.

Seemingly unrelated question: there's an issue with the brake switch on these trucks, I've had a couple go out over the past 13 years of ownership. No big deal currently, I just keep an extra switch in the console. But when this happens, the suspension lowers. With a programmed lift, does anyone know if suspension would lower to the new access height, or to the bumpstops in cases where this brake switch goes bad? Just want to be prepared if the bigger tires rub w/more than a slight turn and a bad brake switch sends the truck to its bumpstops.

My brake switch recently went out. Suspension height did not change but it gave me a handful of transfer case and transmission faults. I believe it was also stuck in 1st gear. Quick change of switch and all was well again.

Mar 3, 2020 | 10:18 AM

#12

houm_wa

Camel Trophy

Joined: Apr 2009

Posts: 4,244

Likes: 482

From: North of Seattle

Hmmm...

That doesn't sound like the typical suite of faults due to brake switch failure. Did you read codes before and after?

Mar 3, 2020 | 10:54 AM

#13

rh32

Thread Starter

Drifting

Joined: Oct 2019

Posts: 26

Likes: 8

Quote:

Originally Posted by houm_wa

I should have mentioned that that's the size I run.

No worries at all. Got everything installed. Happy camper over here. And the tires shouldn’t rub even if the brake switch fails.

Mar 3, 2020 | 11:52 AM

#14

RickyN29

Three Wheeling

Joined: Apr 2018

Posts: 93

Likes: 13

Quote:

Originally Posted by houm_wa

That doesn't sound like the typical suite of faults due to brake switch failure. Did you read codes before and after?

Initially it was messages on the display, cannot recall exactly what they were but then I scanned and got a brake switch code in there so figured that was the culprit. Replaced and no codes came back. Also dissected the switch and saw evidence of arching/shorting.

Codes:Engine Petrol

P0504-64 (2A) Brake switch A/B correlation - Algorithm based failure - signal plausibility failure
P0504-29 (2A) Brake switch A/B correlation - General signal failure - signal is invalid

Instrument Pack

U0102-87 (28) Lost communication with transfer case control module - Bus signal/message failure - missing a message
U0132-87 (2E) Lost communication with ride level control module - Bus signal/message failure - missing a message

Transfer Case

U0132-86 (28) Lost communication with ride level control module - Bus signal/message failure - signal is invalid
( on 22-11-2018 17:24:02 at 252894 km )

Transmission

U0416-86 (2F) Invalid data received from vehicle dynamics control module - Bus signal/message failure - signal is invalid
( on 09-04-2019 08:49:25 at 254192 km )

Mar 3, 2020 | 02:20 PM

#15

houm_wa

Camel Trophy

Joined: Apr 2009

Posts: 4,244

Likes: 482

From: North of Seattle

Looks like the brake switch for sure was bad....those other symptoms are a little disconcerting as well.

Apr 11, 2023 | 10:42 AM

#16

KH406

Mudding

Joined: Nov 2022

Posts: 139

Likes: 20

From: Montana / New Jersey

When you say "brake switch" are you referencing the parking brake switch or the brake light switch?

Reading the response about "keeping and extra switch in the console" and how it lowers height I immediately thought I'd google it and educate myself on that since it must not be too hard if someone's carrying extras to swap out in a pinch. But when I google, the brake light switch is the only thing that comes up which seems weird to me that a brake light switch could cause such havoc - but then again, it is a rover lol.

Just curious if there's a light switch failure bug that I haven't heard of until now?

EDIT: nevermind, figured it out by digging a little deeper - still drinking my coffee ok? lol. Carry on!

Last edited by KH406; Apr 11, 2023 at 11:00 AM.