Easy one?

Cody Forbes cody at 5000tq.com
Sun Oct 14 22:43:24 PDT 2007

 HA! Damnit, I really thought somebody would pop up saying "DUUH you moron, you forgot the other pressure switch on the flux capacitor down by the bomb!!". 

Hmm... I think the best option here would be to short one of the switches so the light always stays on and doesn't beep at me. The beeping is rather annoying (as it rightfully should be), so just stoping that would make me ok with it, but I'd like it to still beep at me if theres another issue so I don't want to kill the noise maker itself ;-). 

Actually the **BEST** option would be to hurry up and get an engine back in my 'fast' 5ktq and put the no-T back on "hold down the back lawn" duty!! I mean geez, as it is my wifes (chipped) 5ktq is faster then my current daily driver...thats just wrong!

-Cody Forbes
'87 5ktq - Fast.
'87 5ktq QLCC'd
'86 5ktqCD
'86 5k
'86 5k

> Easy one, eh?  I'd hate to see a difficult one from you :-)
> AFAIK, and as you said, there are only three sensors on a 5ktq that
> trigger that fault icon.  I assume the non-T non-Q is the same. 
> Since you have ruled those three out, it must be a bad wiring harness
> -- you have an intermittent short somewhere IMHO.   
> Fortunately, it's an easy fix.  Just pull out all the wires, look
> them over carefully, fix the chaffing problem, then put all the wires
> back in ;-)  
> Good luck.
> Bernard
> '88 5ktq
> Woodinville, WA
> On 10/14/07, Cody Forbes <cody at 5000tq.com> wrote:
> Patient is my '86 5k no-T no-Q. The red triangle brake fault icon
> keeps poping up (with the dreaded tripple beep of course) at random
> times while driving down the road. Zero reproduce-ability. In my 19
> mile (each way) commute it will happen two to three times one day,
> then the next will be non stop - no pattern.    
> Now AFAIK the 3 things that trigger that light are the pressure
> switch on the booster, the brake fluid level, and the hydraulic fluid
> level. Fluid levels are both ok, and the low pressure switch IME 99%
> of the time only trips the light when using the brakes in a car with
> a bad bomb, while this problem happens on flat level highway while
> maintaining speed. In a futile attempt to narrow it down I tried
> disconnecting the 3 switches one at a time, and eventually all at
> once, with no luck - with all 3 disconnected the light still pops up
> at random.        
> Yes, it has green stuff and only green stuff in the system. No, it
> actually doesn't leak much at all and I've never replaced any hoses.
> Yes, the bomb is mostly bad and I can't afford a new one. Yes, I
> normally leave the switch in the booster disconnected so the car
> doesn't beep at me every time I hit the brakes hard.    
> There simply must be another sensorw/switch that trips the diag
> system into throwing that light, but I wasn't aware of such an item.
> Please do tell!  
> -Cody Forbes
> http://www.5000tq.com
> '87 5ktq - Fast.
> '86 5ktqCD
> '86 5k
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