Rear brake bleeding struggles

Ricko1966 said:

Yours shouldn't have a button. I'd buy a centering tool, unplug the harness from the brake warning light,unscrew the brake warning light. Look at the end of the warning light switch that little Plunger drops into a groove in the shuttle to turn the light off. You should be able to get the shuttle to center by pumping the brake pedal,then opening a front bleeder while holding pressure on the pedal,I've heard of people using a small screwdriver to move the shuttle to center. I've never tried. I believe the threads on the switch are 1/2 x 20 to improvise a centering tool I'd drill the end of a 1/2 x 20 bolt a stick a piece of a nail in the drilled hole. Look on line for a centering tool,a pic and it will make sense.

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Chris64 said:

I think that's a button on the left (it pushes like a button). The plug is in there very tight. At this point I still haven't been able to remove it. This pic makes it look easy to access.

So Am I correct: I need to figure out how to unplug wire, unscrew it and then use a pick or something to recenter it and then use the holder tool to bleed everything?

I'll acquire a holder tool as that sounds like it's required.

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Ricko1966 said:

That's not a button it's a rubber dust cap that seals the valve, don't eff with it,you can't get a new one.And I'd try centering the valve with the pedal first, pump it 3 or 4 times then push and hold while somebody opens right front bleeder. If that doesn't do it,then try centering the shuttle with a small screw driver. Yes you unplug the wire from the switch,unscrew the switch,screw in the centering tool and bleed the brakes.

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Chris64 said:

Here's where I'm lost - If I can get it centered now, can I bleed the rear without the tool?

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Chris64 said:

OK, nothing is easy.

I got my holder tool tonight so naturally I had to go out in the dark and give it a whirl.

The switch came out fine but the tool wouldn't fit. A line ran behind it that kept it from lining up with the threads so I had to whittle it down a little.

Before

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After

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and now it fit

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You can see that tube that was blocking it above. I had to take pictures to see any of this.

So while it was off I stuck a test light tip and did some feeling around. It felt centered. I could feel a flat space in the middle and a 45~ degree ramp up to each side. I tried moving it and it didn't want to budge either way.

I was thinking, maybe it only moves under pressure and then moves back (who knows?)

Anyway, so back to vacuuming a rear line. No luck after about 5 minutes.

I guess my next step will be either the line out of this proportional valve or the junction about half way back.

Just thought I would post my latest and document my suffering . I'm kidding. This stuff can be fun and I've always dreaded bleeding brakes. When I get this fixed I will be very happy.

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