Here you go.

On page 5.1, lower or far right side of the drawing shows the fast idle circuit.

I can see that Relay 7 is energized when the Fast idle switch is on which completes the circuit from the transmission neutral switch and the parking brake switch.

Once Relay 7 is energized RS1 and RS2 simulate changing the Trottle position sensor such that it will run at 1,000 rpm.

If Relay 7 is not energizing when the parking brake is on, the transmission is in nuetral, and the fast idle switch is on:

With the parking brake on and the Fast Idle switch on, you should 24V on Pin 86 or R7. If you don't find it there, check at pin 2B on the Fast Idle switch. If not there, check Fuse 7 and the parking brake pressure switch.

With the transmission in Neutral, pin 85 on relay 7 should have a ground. If not check the VIMN relay for the transmission.

If Relay 7 is energizing, check RS1 and RS2 and their connection to the trottle position switch.

d060912p05_1r00.pdf
d060912p08_1r00.pdf
d060912p06_1r00.pdf