Quote:
Originally Posted by wigginsjsr
I would be interested in you showing how I could replace the heater and still have the indicator light function when the heater comes on.
|
I did exactly what you are asking, and it is posted back on #7.
Your wiring harness will have a connector with three wires. One RED, one WHITE and one BLUE.
The Red and White wires are the 12 VDC positive and negative to drive the heater and fan. They are heavy gauge wires. The Blue is the SIGNAL wire coming from the SNAP disc.
If you remove the heater, the SNAP disc still operates and the switch and indicator light will light up when operational.
Read Post #7 to see the type of 12 VDC heater I installed. Since it did NOT have an internal relay like what the Cargo Heater has inside to turn the heater and fan on and off, I had to buy one from NAPA and wire it into the circuit. You can see that in the photos.
The operation is very simple.
When you turn the SYSTEM HEAT switch on, it arms the system but the cargo heater will NOT come on until the set temperature of the SNAP disc is reached. When the SNAP disc closes, it sends a 12 VDC signal to the relay which then causes the relay to close and allows the positive 12 VDC to start the heater and fan.
Your tank pad heaters operate completely separate from the bay heater. If you look at the electrical schematic, you will see that there is a separate relay just for the tank pad heaters. There is no SNAP disc for the tank pad heaters. When the System Heat switch is ON, the tank pad heaters are always on. It is only the Bay Heater that has a temperature control.
Dr4Film ----- Richard