PT Cruise Control Replacement

[Ralph L. Fullenwider]

Hi Scott:

In the engine compartment, curb side under the grill on the back wall above
the batteries, there should be a black Bosh relay 30 amp. There should be a
wire going directly to a 12 vdc positive source. Be sure there is 12 vdc on
that wire at the relay. Then go up and turn the key switch to the "run"
position, no need to start the Coach and switch the cruise control on/off
to the on position. Then with a multimeter go back to the relay and see if
the coil energized and if the 12 vdc is now on the front wire from the hot
Battery wire you checked earlier. If no 12 vdc then check pin 86 and see if
12 vdc there, and check pin 85 for voltage. If no voltage replace the Bosh
relay. There are many checks that can be made to trouble shoot this system.

Safe travels,

Ralph and Charolette Fullenwider
84FC35 "Ruff Diamond"
Duncan, Oklahoma

At 11:35 PM 11/11/2008 +0000, you wrote:
>My cruise does not work, and I cannot figure out why. I also
>understand that some parts for this old system are no longer
>available.
>
>With that in mind, has anyone installed a new cruise system on an 80's
>PT with 8v92? I really want to have cruise. I am open to suggestions.
>
>Scott Forman
>86 PT38
>Memphis
>