Author Topic: Blackout resisitor location?  (Read 4321 times)

8683jb

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Blackout resisitor location?
« on: January 24, 2017, 08:21:18 PM »
I'm rewiring my M2A1 and would like to confirm the location of the 6V blackout resistor. Mine is located on the top left front of the firewall but I've seen one mounted in the same location on the rear of the firewall. Which is correct? Is either location used? I can't find any other pictures or info on it. Right now I have the wire for it running out of the firewall with the rest of the wires but maybe it needs to stay inside with the tach light wire? Thanks for the clarificafion.
'42 Autocar M2A1
'41 Nash Kelvinator Ben Hur trailer

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RocnTJ

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Re: Blackout resisitor location?
« Reply #1 on: January 24, 2017, 08:30:18 PM »
I have an Autocar M2 converted to M2A1.   Mine was located on the rear of the firewall inside the cab.   I have seen them in both locations.

Tom
1948 Willys Truck
1949 Willys Jeepster
1959 Willys Wagon
1968 Kaiser M725
1969 Kaiser M715
1976 Jeep Cherokee Chief
2002 Jeep TJ
And the Latest Edition a 1942 M2A1 Halftrack

8683jb

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Re: Blackout resisitor location?
« Reply #2 on: January 24, 2017, 09:21:09 PM »
Thanks Tom. Looks like it'd be easier to get to on the outside if it needs attention.
'42 Autocar M2A1
'41 Nash Kelvinator Ben Hur trailer

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prestone

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Re: Blackout resisitor location?
« Reply #3 on: January 25, 2017, 02:19:13 AM »
On my M2 the resistance is inside
1941 GMC 353 A1      restored
1943 GMC 352 B1      restored
1943 WILLYS MB        restored
1944 TRAILER MBT     restored
19..   CHECKER 1T      restored
19 . . AUTOCAR M2     under restored

col.halftrack

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Re: Blackout resisitor location?
« Reply #4 on: January 25, 2017, 10:12:10 AM »
 I have noted four locations. Below in order of popularity:
 1. On firewall extreme upper left (drivers side) in engine compt.
 2.  Same location except resistor is in crew compt.
 3. On sloped surface under surge tank.
 4. On coil box lid.
I have not been able to establish a pattern either by manuf. or model.
 Perhaps those of you with original vehicles could post the make, model, and location of resistor remembering that not all half-tracs had one.
 Kevin
1941 White M2
1942 White M4A1 was M4
1942 Autocar M2A1
1942 Autocar M3-75
1943 White M13 rebuilt as M16
1943 Diamond T M3A1

8683jb

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Re: Blackout resisitor location?
« Reply #5 on: January 25, 2017, 10:19:42 AM »
Thank you guys for the help. I thought if it was on the wrong side, now would be the time to fix it. I'll leave it where it is.
'42 Autocar M2A1
'41 Nash Kelvinator Ben Hur trailer

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woodwalker

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Re: Blackout resisitor location?
« Reply #6 on: January 26, 2017, 09:42:45 PM »
3-4 whites m2s all on sloped part by surge tank  little to no farmer mods but most if not all army rebuild