turn signal flasher/distribution box

grantj · Post by **grantj** » Tue May 08, 2007 5:56 pm

I bought a military turn signal kit. The wiring diagram appears to be for some M series truck, but also mentions the M38 and M38A1. Instead of a flasher, it has a distribution box that connect the signal arm wires and then has separate points/connections for wires to the lights. Is this all I need? (Besides the rear light conversion and additional front lights) The accompanying wiring diagram does not show or mention a flasher bulb to act as a circuit breaker. Do I need one? If there was a break, would that go through one of the circuit breakers mounted behind the gauges? thanks for any help , before I try to install it....grantj

cmpman · Post by **cmpman** » Tue May 08, 2007 9:15 pm

If it is the later M series signal kit, the distribution box is actually a solid state flasher unit. Is it a small box with a 3 wire screw on wire harness leading into it? One of the three wires is a ground?
The solid state flashers, on failure, can be replaced with a normal 2 prong 24 volt flasher by running the two wires through the flasher and ommitting the ground wire. This can also be done to use the newer M-series signal kit with a 12 volt system.

There was also another style of signal kit which came on thr M38A1Cdn2 of 1967/68 vintage. It had a large distribution box mounted on the engine side of the firewall. On failure of these, we replaced the whole system with the solid state setup.

grantj · Post by **grantj** » Wed May 09, 2007 9:42 pm

It is the large distribution box, about 4x4". It has the posts (screws) labelled in the corresponding alphabet letters for the wiring. The signal indicator has 6 wires attached to it. I suppose I could just put in a fuse breaker of some sort to prevent an overload. .. grant

cmpman · Post by **cmpman** » Thu May 10, 2007 6:31 am

I haven't seen one of those systems in over 20 years. As I mentioned, on failure we would pull them and replace them with the solid state system. I have the maintenance manual around here somewhere for the M38A1Cdn2, which had these factory installed. It should have the wiring diagram.

BobW · Post by **BobW** » Thu May 10, 2007 4:59 pm

Check this out, it may be helpful.

http://www.cj3a.info/sibling/m715/tswire.htm

grantj · Post by **grantj** » Thu May 10, 2007 6:34 pm

Thanks cmpman and BobW. The cj3b link with M715 wiring is very close to the diagram with this kit. Only a couple of differences in the lettering. ie "M" is the ground, not "B". and one or two others.
I'll give a go this weekend if I find the rest of the lights I need.(stashed away in my parts cupboard)...grant j

SteveJ · Post by **SteveJ** » Sat May 12, 2007 11:12 pm

Hi Grant. I just installed my new wiring harness that I got from Brian Asbury. It has the solid asrtate signal mod and the whole thing was easy to install and works great.

grantj · Post by **grantj** » Sun May 13, 2007 7:17 pm

Hey Steve..I sent you a PM..grant

willysmjeeps.com

turn signal flasher/distribution box

turn signal flasher/distribution box

signal box

signal wiring

signal