DUI 4 pin module
- Thread starter thumper
- Start date
1975IH200
Active member
Be sure you use the dialectric grease under the module. It acts as a heat-sink to keep the module cool.
Most modules come with a small packet of grease inside the box. If not, then the auto parts store will have some.
Also. It is cheap and easy to carry a spare module in the glove box.
Most modules come with a small packet of grease inside the box. If not, then the auto parts store will have some.
Also. It is cheap and easy to carry a spare module in the glove box.
thumper
New member
Sorry for the slow response. Here are the pics. Not much to see the power for the distributer is taken from the decelerater circuit. As the normal two plugs that went to the gold box did not show power. But I think I am going to put in a relay and a fusable link and go strait from the battery. I am not sure if I am loosing power on the circuit I am on now. Sorry the pics will come later I can't figure out how to load them from my phone
I know nothing about dui install, but what you describe (wiring) does not make any sense.
You need to search for a thread on dui install (here or elsewhere) and find the correct way to wire it. Probably why you are burning out modules...
thumper
New member
Ok so I did like dui recomends and ran the feed wire from the starter silenoidto a relay then to the distributer and got 1 start then another blown module. I am thinking the distributer is cursed. I have a email in to the dui guys about this. The pics are of the old set up I will try to get some pics of the relay tomorrow.
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Scooter
Active member
Have you installed a diode in the alternator wiring?
It's common to install one in the small gauge exciter wire. Especially after any type of upgrades that we do to these old rigs. I recently just read another tech forum about a very similar install as yours and the diode was the cure for the engine run-on when key turned off.
I kinda agree that sumfin aint hooked up right. I'm kinda of the mind set that that deceleration curcuit might be causing your headaches and additional expense
It's common to install one in the small gauge exciter wire. Especially after any type of upgrades that we do to these old rigs. I recently just read another tech forum about a very similar install as yours and the diode was the cure for the engine run-on when key turned off.
I kinda agree that sumfin aint hooked up right. I'm kinda of the mind set that that deceleration curcuit might be causing your headaches and additional expense
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I have a dui in my 73' 345 s2, it was used when I got it and had a dead 4 pin module. I replaced the module and it runs fine every time now. I did not look at an instruction manual for the install at all.... However I have not burned up my cheap chinese module. I have the power for my dui coming from the key'd ignition and tied into the electric choke for my 1406 edle. Maybe this isnt the way to do it but it works fine for me. I have over 50 starts on it(would have more but im doing a 727 reseal). I have heard that coil in cap distributors burn out the module if they get power when the truck is off and they are not discharging, im not 100% if thats true or not but I took that into consideration when I did my install.
thumper
New member
Thanks for the replies, I set up the relay wrong this last try. Now I have power from the starter on a fusable link to the high power input of the relay and have the decelerater circuit on the low end power switch side of the relay and to ground (that is the part I messed up) on the other side of the low end power. And full power to the distributer from the high power output side of the relay. So far I have got three starts now I can stand down the garand.
