Quote:
PackardV8 wrote:
i'm also bewilldered by the "blows a fuse" statement. I do not see any fuse in the wireing diagram for the PB circuit. Only a circuit breaker.
If the pressure switch (part of the PB circuit) goes bad then engine will not start. See p 118 of Twin Ultramatic section of service manual. IF pressure sw is burned out just disconnect wires from switch and plug them together as a temporary work around.
The fuse I suspect we are talking about is the additional 9 amp first mentioned in bulletin on how to remove the auto park. It was added to protect the fingers and some other items & suggested to be placed on all cars. In original design, power to those was fed directly off ign sw. The breaker "protects" the motor side but as Randy found, even that is not necessarily the case with a self resetting breaker.
To eliminate a lot of wiring, the buttons can be all "unpressed" before turning on the ignition. That way the fuse will only see the auto park relay coil, wires to the pressure sw, and feed side of 3 buttons on one side and the second direct feed to the other 3 buttons on the other wire. If it still blows, then shorted wire, pressure switch, or as you mentioned, a contact is most likely.
To "unpress" the buttons, push one on the same row as the one already pushed but only about half way down until the original button pops up. Pull the button being pushed to release the first one back up before it latches.
Once it's figured out when and what is blowing it then troubleshooting can continue.
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