Code Alarm CA 521 Installation Instructions Manual page 6

2. THIRTEEN PIN HARNESS, CONTINUED
Wait-To-Start Input (+) (GRAY/BLACK)
Locate the Wait-To-Start light wire at the instrument panel.
Verification: This wire registers positive or negative voltage when the wait-to-start light illuminates.
For Positive switching circuits follow the diagram below.
Wait-To-Start Bulb
At Instrument Panel
GRAY/BLACK (+) Diesel
Wait-To-Start Wire
1N4004 Diode
Vehicle Control Module
Ground
For Negative switching circuits follow the diagram below. Use Code Alarm part HDRLY (an SPDT relay, not
included).
Ignition
87
Wait-To-Start Bulb
At Instrument Panel
87a
85
86
30
GRAY/BLACK (+) Diesel
Wait-To-Start Wire
Ignition Vehicle Control Module
NOTE!
The CA-521 has an optional Wait-To-Start feature that provides a pre-set wait-to-start time.
When using this feature it is not necessary to connect the GRAY/BLACK wire above.
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