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Just used my power probe. With the ignition key on and the NOS 2 speed wiper switch off, all terminals at the motor plug are dead. With the switch in low I get 11.4 volts at the terminal which plugs on the lower spade. With the switch in high, I get 11.4 volts at the terminal that plugs to the...

Going to try pictures this time. I have two switches. One is part number 3488781 which I was told is a 1972 only two speed wiper motor switch. I have another switch which is part number 3488764 which I think is a 3 speed wiper motor switch. OK, so I had to purchase a used dash harness as...

OK. I think I figured my issue. Now I need to figure how to fix it. My car came with a 2 speed wiper motor. My dash harness was toast, so I bought a nice used clean one. After doing all the install I plugged in a wiper switch I had and the motor would not work. I realized that the new...

Hi, I have a blue and a gray wire going into a connector plug which has slightly angled terminals. The plug is located under and inside the drivers side kickpanel. Can't find it in my 72 diagram? Is it something to do with the seat belt light or buzzer that is attached to the two floor...

I bought a used dash harness for my car as mine was hacked up. I am just now checking the wipers and I am finding that my 72 2 speed switch will not plug into the harness but I do have a 3 speed switch that will fit the harness connector plug? It is 3488764 and has a rectangular small box off...

OK., Just putting wiring together. Installed a new front harness. Installed new headlights and plugged them in. Installed new bulbs in my 72 Demon grille parking lights and plugged them in. The side marker and top of fender connections are just hanging loose because I did away with the...

I am not getting my autometer tach to run. I installed an MSD 6AL brand new. Instructions and MSD call verified I should use the gray wire coming from the msd box. They also told me the autometer tach I bought brand new needs no extra parts to make it work. Basically I have a keyed on...

I very carefully on a bench removed my standard printed circuit dash. I took the round harness plug that feeds all the instruments and cut the plug away from the wires. I installed all new autometer gauges in a new panel. I then used my manual to follow the color code wires. I added more...

I am trying to find key on 12v power? I have a probe light which a clamp to the negative battery post. With the key on, I am probing the two small terminals on the starter relay and nothing lights? I am probing the two field terminals on the alternator and nothing lights. The only way I get...

ok, so I am looking to wire my electric choke on the holley carb. so far I just ran a short jumper ground from the ground terminal to under a screw that holds the choke assembly to the body of the carb as it shows in the holley website. Now I am looking to run a positive 12v wire to feed...

I know I have seen this many times, but I am at a loss for where it plugs to?? It is a brown wire??

My demon has 7 fuses in the fuse block. Part number 3588198... my manual shows only 6 and has part number 2291593?? Can anybody here clarify this? I did buy a used good harness for this car and it appeared to look the same?? My car is a stock 340 a/c car???

I just tried to hook my battery cables to my battery. Got the positive on the battery which also has the big red wire from the msd6 box and also a direct 10 wire from the alternator to do the mad ammeter change over to a volt meter. When I tried to install the negative cable to the battery I...

Installing MSD 6AL and they want me to tie the red msd wire to the two ballast resistor wires which are brown and blue? Only issue I have is that the ballast resistor on my 72 car has 4 connections. There are actually two brown wires twinned together to one post and a green with red tracer on...

I am trying to hook up my engine electrical. I am installing a 6AL MSD box and a ready to run MSD distributor and using an MSD coil. I have installed all new amp meter gauges in the custom dash on a bench. I also wanted to dump my amp meter for a new voltmeter using the MAD wiring diagram I...

OK, So am hooking my MSD 6AL up and so far I ran the orange and black harness to my MSD coil. Then I have a heavy black and a heavy red which instructions say Red to positive battery and black no negative battery. Am I assuming these actually go on my solenoid next to the battery?? Then the...

I installed a Chrysler mini starter and the two studs appear to be metric. I got an 8mm x 1.25 tread to fit the larger post but am having an awful time with the small post on the starter. Can anybody here help me out with these nuts. They were not on the starter when I got it. Where can I...

OK. I am just getting things ready to fire her up. But I have more questions than answers because I suck with electrical. So here we go. First off I installed ammeter gauges in my car which includes a tach and also a volt meter. I followed the MAD electric instructions to get rid of my amp...

Trying to identify a small lamp in its own harness located on the drivers side of the dash. It has a solid dark blue and then a blue with the white trace. It is in a moulded plastic socket. I know my 72 Demon had all the other bulbs just turn into the clusters printed circuit system. I have...

I upgraded my dash and installed a volt meter. (see pictures). I took the black and red wires at the old amp meter and soldered them together right at where they were located for the amp meter. Installed shrink tube and then taped over for a good connection. I installed the volt meter by...

Putting my motor back in. I was curious if the motor has to be installed in the "park" position when hooking the linkage arms under the dash to the motor and then install the actual wiper arms on the window in the parked position? If so, how can one tell if the motor is actually in the parked...

I am in process of eliminating my amp gauge and installing a voltmeter. I am using the MAD electric instructions. It talks about routing the black and red 10 gauge wires thru the bulkhead uninterrupted so as not to have those connectors. It also mentions using a 14 GA fusible link on the...

OK, so I got all my autometer gauges wired. Replacing the stock panel in my 72 Demon. I installed a voltmeter, removed the alternator amp gauge. I just soldered the two amp gauge wires together and taped them really well. (black and red). Now, I understand that the blue with white tracer...

My 72 Demon has these two relay modules located on the drivers side. Can anybody here tell me what they are for?

Hi Guys, PART ONE: I have my 72 Demon dash on the bench. I am installing Autometer gauges. These will include speedometer, tachometer (with MSD 6AL), oil pressure, temperature, volt meter, and fuel gauge. So I installed the gauges into a new plastic dash insert to hold them in place. I...

Hi Folks, I am trying to understand the (I think) seat belt relay in my 72 Demon. It is part number 3588587. I no longer have the original front seat for this car. And I thought it was just a buzzer that is set off by sitting in the seat until you buckle up? Is that correct? And if so, I...

I need to get a distributor to go with the MSD6AL. It is for my 340 416 stroker motor. I am running a 750 holley with electric choke. I want the car for mostly street cruising on the highway. Should I get a vacuum advance ready to run MSD distributor or should I get an MSD pro billet...

Where is the safest place to mount it so the harness will reach and not have to be spliced?

Can we see what folks have done to install a temperature, oil pressure and amp/volt gauge into their stock 70-74 Demon Duster and the locations they fit best in. I feel the need to have all three in the for of numbered gauges rather than idiot lights to keep track of things. I have been...

Is anyone running one of the FBO ignition boxes with rev limiter? Eliminates the ballast resister. Was curious to hear feedback.