Engine Temp

This is what it says in the Hotwire Auto install guide that they emailed me:

15. Open Wires (wires vary by harness options)
a. Red – 12 Volt Hot at all times. (direct to battery)
b. Pink – 12 Volt Run and start. (ignition key on position)
c. Yellow – Ignition start. (ignition key cranking position only) You must use the included starter solenoid wiring for the engine to start properly. (Mopar muscle cars: You will need to use a momentary push-button starter switch with this wire on one post and 12v on the other post, the dual ignition circuit of a late 60’s to early 70’s Mopars will not work with the Hemi system)
d. Blue – Brake light output to rear brake lights.
e. Purple – Backup lamp output to rear backup lamps.
f. Orange – Overdrive off Switch to momentary ground. (optional, automatic only)
g. Blue/White – A/C compressor clutch. (12 volts to activate compressor)
h. Black – Clutch safety ground. (manual trans) This must be grounded in when the clutch is pushed in or in Park/Neutral on a non-electronic transmission.
i. Green – Speedometer output to gauge.
j. Grey/Black – Oil Press Gauge (open on both ends for you to hook up your own sending unit)
k. Tan/Black – Engine Temp Gauge (open on both ends for you to hook up your own sending unit)