Yes, I know another PM question.
But I have searched here, read Richard Clark's book and all the docs on gnttype.org and haven't found my particular issue.
So I beg of your help please...
I’m having intermittent brake failure.
At start up all brake functions show normal.
Light and PM motor run normally.
Fluid levels pressurized and unpressurized are correct.
No leaks
30 AMP fuse is good.
5 minutes into drive brake light comes on and off for a few seconds, brakes are operating normally.
10 minutes into drive, brake light comes on, stays on, still have brakes
A couple minutes later no brakes,
Pull over, re-start procedure, still no brakes.
Turn around, head home.
Brakes come back on a couple minutes on the way home.
Arrive at home a couple minutes later and light comes on and no brakes.
I do live in a VERY hilly area if that makes any difference.
From the diagnostic flow chart:
Start, light comes on, yes
Disconnect pressure switch, light comes on, no
Reconnect pressure switch
Depressurize accumulator
Check correct fluid level on passenger side, level ok
Turn on ignition, determine time, light off in 5 seconds, motor off in 7 seconds
Replace the accumulator
Retest
Depressurize accumulator, same results, but still having intermittent brake failure.
But I have searched here, read Richard Clark's book and all the docs on gnttype.org and haven't found my particular issue.
So I beg of your help please...
I’m having intermittent brake failure.
At start up all brake functions show normal.
Light and PM motor run normally.
Fluid levels pressurized and unpressurized are correct.
No leaks
30 AMP fuse is good.
5 minutes into drive brake light comes on and off for a few seconds, brakes are operating normally.
10 minutes into drive, brake light comes on, stays on, still have brakes
A couple minutes later no brakes,
Pull over, re-start procedure, still no brakes.
Turn around, head home.
Brakes come back on a couple minutes on the way home.
Arrive at home a couple minutes later and light comes on and no brakes.
I do live in a VERY hilly area if that makes any difference.
From the diagnostic flow chart:
Start, light comes on, yes
Disconnect pressure switch, light comes on, no
Reconnect pressure switch
Depressurize accumulator
Check correct fluid level on passenger side, level ok
Turn on ignition, determine time, light off in 5 seconds, motor off in 7 seconds
Replace the accumulator
Retest
Depressurize accumulator, same results, but still having intermittent brake failure.