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It is actually much older, the FET (which obviously the TDM uses because of its low drive requirements) was developed in the mid 40s, the solenoid controlled valve in the early 1900s and the bi-metal strip used in the thermal switch is at least 200 years old.
I cut my teeth on this stuff in the...
I was surprised at how little the valve actually drew as far as current, I did not say the thermal switch could not power the valve I just said I would not assume it would and that with the TDM it is not actually powering the valve in that application. I would love to get my hands on one of...
The Cadillac valve pulls around 3/4A, I cannot even read the current going through the thermal switch so (must be in micro amps) the thermal switch is obviously not powering the valve directly, the TDM uses the signal from the thermal switch and the kickdown switch to determine to switch power...
The minimum you will need are these parts, the adapter and the switch, the switch is the same as the neutral switch which cost less than half of what most are trying to get for a "reverse" switch, you can get these off of fleabay for around $90 total, which is still too high IMHO....
AGAIN what I am trying to say is that the HMMWV does not have that switch so it could not be an issue.
Start the video around 2:00
All HMMWVs use the early style shift shaft because they do not have a NSS mounted to the side.
Again the neutral safety switch in a HMMWV is in the shifter not on...
This is how I would do it, I added a diode to protect the relay contacts, it should be a 1000V 1A (1N4007) diode.
It is a little sloppy, sorry...
I would use this relay, and of course carry a spare, this relay is "protected" meaning it protects the fan thermal switch against reverse EMF...
It would be easy enough to do, if nobody has a schematic I could work one up, easy peasy.
You would need a 24V relay (with normally closed contacts) a switch and a fuse.
I only want to get the correct information out there to help folks in need.
NO HMMWV ever had an ODB-II, they use the same transmission and TCM configuration that was used on the 6.2L mechanically injected non ECM vehicles before the mid 90s.
Again I ask have you seen that NSS switch on a...
The neutral safety switch is in the shifter and has nothing to do with the range switch that is in the transmission.
It only prevents starting the vehicle unless the shifter is in neutral and or park in the case of a 4 speed and has no connection whatsoever to the transmission wiring.
I would look at Kascar and HPG
Others may have suggestions.
I have seen some "real" surplus ones on that infamous auction site, the parts TM will give you the needed NSN numbers.
Ol Diggy Dog and I rolled on down to the beach just to check out the crowd, Diggy Dog had a great time barking at just about everyone and whining at just about every dog she saw.
We did not see any Humvee's or any other military vehicles but did spot this resto-mod Willys Woody which was pretty...
I just got coverage on a 2008 HMMWV through J C Taylor with a 13K stated value and 300/300K on the liability for around $325.
I pay about twice that amount for my 1992 HMMWV with the same liability and a stated value of 25K with Hagerty
Hagerty does not seem too concerned with annual mileage...