Hi,
I just purchased as 12HT JDM motor currently wired for 24 Volts. I am going to put this in my 1982 FJ40. I am trying to plan out my wiring components and have decided on the following :
Dual Batteries
24 volt starter
12 volt engine sensors (Temp, fueld shut-off etc).
12 volt alternator
12 volt winch
12 volt jump capability
Solar 12 volt battery equalizer
I want to stay 12 volts (except for start) because I will have high current demands (Lots of lights, Compressors, A/C blower, Winch.
I want the 24 volt start because everything I have read here says it is superior to 12 volt.
I am looking for a single solenoid solution that I can use to wire the batteries for 24 volts to start (series), then switch to 12 volts (parallel) for normal running/charging.
I don't want to use a bunch of individual solenoids because if one ever fails/sticks or does not fire at exactly the right time it could short out the batteries. Ideally, I want to find one relay that has a 2 normally open and 2 normally closed contacts to do the job. I have really searched around in many auto electric catalogs, marine and rv supplies, and MUD (of course!) and come up with nothing. Surely I am not the first to try this?
I tried to see if I could use an OEM solenoid from another vehicle:
I heard rumors that some 80's vintage semi's trucks (lorries?) had a similar setup but I couldn't find anything.
I have heard that the 81's have something like this, but they have a complicated timer setup integrated with them. I don't have a schematic or parts manual to confirm this. Also, I am in the US so it would be difficult to find a used solenoid from this.
I am speculating that Ford diesel pickup trucks use a 24 volt start since the have a dual battery setup, but I can't find any schematics for to confirm this.
The nearest generic device that I have found is an air conditioner contactor w/ 4 contacts, but I am worried that it will fail with the high-current demands of starting.
Any help is appreciated in selecting a solenoid.
- Eric
I just purchased as 12HT JDM motor currently wired for 24 Volts. I am going to put this in my 1982 FJ40. I am trying to plan out my wiring components and have decided on the following :
Dual Batteries
24 volt starter
12 volt engine sensors (Temp, fueld shut-off etc).
12 volt alternator
12 volt winch
12 volt jump capability
Solar 12 volt battery equalizer
I want to stay 12 volts (except for start) because I will have high current demands (Lots of lights, Compressors, A/C blower, Winch.
I want the 24 volt start because everything I have read here says it is superior to 12 volt.
I am looking for a single solenoid solution that I can use to wire the batteries for 24 volts to start (series), then switch to 12 volts (parallel) for normal running/charging.
I don't want to use a bunch of individual solenoids because if one ever fails/sticks or does not fire at exactly the right time it could short out the batteries. Ideally, I want to find one relay that has a 2 normally open and 2 normally closed contacts to do the job. I have really searched around in many auto electric catalogs, marine and rv supplies, and MUD (of course!) and come up with nothing. Surely I am not the first to try this?
I tried to see if I could use an OEM solenoid from another vehicle:
I heard rumors that some 80's vintage semi's trucks (lorries?) had a similar setup but I couldn't find anything.
I have heard that the 81's have something like this, but they have a complicated timer setup integrated with them. I don't have a schematic or parts manual to confirm this. Also, I am in the US so it would be difficult to find a used solenoid from this.
I am speculating that Ford diesel pickup trucks use a 24 volt start since the have a dual battery setup, but I can't find any schematics for to confirm this.
The nearest generic device that I have found is an air conditioner contactor w/ 4 contacts, but I am worried that it will fail with the high-current demands of starting.
Any help is appreciated in selecting a solenoid.
- Eric