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Brian Butt 06-01-20 17:49

M8 Questions
Does anyone out there have a wiring diagram for an M8 Greyhound? Also are there different switches for the head/blackout lights? Trying to trouble shoot the electrics on the Ontario Regiment Museum's M8, and without the diagram it's a exercise in frustration! :confused

James P 06-01-20 20:09

A question to your question.
Do you folks not have a copy of the TM9 for the vehicle ? Have you called Vintage Wiring of Maine (207 465 3431) who I am sure can provide you a copy of the schematic diagram for wiring the car ? Books and manuals are your friends.

Big D 06-01-20 21:17

1 Attachment(s)
Hi Brian,

See if you can get hold of TM 9-743. It is still a free download on the net.

James P 06-01-20 22:26

What Darryl says X2, easy enough to find/buy from eBay.

Brian Butt 07-01-20 17:57

Thanks Darryl, it's much appreciated. :salute: you wouldn't happen to be familiar with the two different styles of headlight switches used on M8s? The one we have is the type I've seen on Dodge trucks from WWII. I'm just trying to figure how its wired up as the diagram in the manual appears to be the pull type switch. Maybe I just need more coffee! :coffee

Big D 14-01-20 08:16

Hi Brian

What are the two types you have?

motto 16-01-20 03:28

During WW2 there were two types of blackout headlight switches used on US military vehicles. Earlier vehicles were fitted with a push/pull switch whilst later production vehicles used a five position rotary.
I assume the M8/M20 went through this change also.
The main difference in the function of the two switches was that the BO Driving light control was incorporated into the rotary unit instead of having a seperate, dedicated, switch on the dash.


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