ARCHIVE BlackBox-C Land Cruiser Planetary Underdrive

[fjdiesel]

I see there are a couple options. So I would like your guys input. On the thermal switches there is 2 pole normally closed. I assume a person would want to control the relay with that style switch and not the pump..?

I also see grounding thermal switches which are 1 wire. I assume you could control the relay ground with that style..?

Less wiring running under the vehicle with 1 wire. But what other pros and cons to each. Thanks.

 

[Stumpalama]

I see there are a couple options. So I would like your guys input. On the thermal switches there is 2 pole normally closed. I assume a person would want to control the relay with that style switch and not the pump..?

I also see grounding thermal switches which are 1 wire. I assume you could control the relay ground with that style..?

Less wiring running under the vehicle with 1 wire. But what other pros and cons to each. Thanks.

while not being an expert WRT vehicle electronics, I would go with a switch that was open when cold and closed (grounded) when at appropriate temperature.
@emorth bat signal lit... ( he is our club’s EE expert and retired automotive electronics instructor)

 

[GLTHFJ60]

while not being an expert WRT vehicle electronics, I would go with a switch that was open when cold and closed (grounded) when at appropriate temperature.
@emorth bat signal lit... ( he is our club’s EE expert and retired automotive electronics instructor)

Same thing I was thinking. Normally open thermo switch, that closes when it hits (or goes above) temp. That wired into the control side of the solenoid powering the pump would be perfect.

 

[emorth]

This is how I would do it.

 

[fjdiesel]

This is how I would do it.

View attachment 2499351

Thank you for the diagram!! I was thinking it would be nice to switch the ground but wasn't sure how to do that.

 

[emorth]