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70 Charger Electrical GREMLIN- Hazzards

Posted By: challngr08

70 Charger Electrical GREMLIN- Hazzards - 03/28/14 12:10 AM

Guys need a little help here. Have spent the last 6 hours messing with the electrical on my 70 Charger. Keep in mind the car has not been operated for the last 12 years. So the car has new dimmer switch, turn signal switch, dash circuit board. new rear tail light harness and engine harness. The under dash harness looks great with no splices or what looks like tampering with the dash harness. replaced the fuses and both flashers. OK on to problem.
When I connect the battery, the hazard flasher starts going and I have rear hazards immediately. If I turn the headlights on, I get the left dash light on immediately. Not sure why, but I do. If I turn the turn signals on, BOTH flashers start going and its a mess. Then when I try to turn the turn signals off, in the center position, both flashers continue to go off until I turn off the key and then just the hazard flasher continues to go. I have no brake lights either but the brake switch is untested at this point. I disconnected the headlight switch and the light goes off in dash, but the flashers continue. I also stopped the emergency flashers at the fuse box, and the left and right turn signals worked as they should , but once again, as soon as I tried to turn the turn signals off, the turn signal flasher continued and once again I had FLASHERS, both of them going again. Taillights are properly grounded and they work. Nothing obvious that I can see. I keep leaning towards the new turn signal switch. Is it possible the color coordination is off from the original? Unfortunately my original was destroyed. Any help is appreciated. Keep in mind I do know electrical decently well, and its not a bulb or the rear lights needing grounded. Ive done all the obvious. I just need a new direction or how to break this down. I have a 68 and 69 schematic but not a 70. Thanks guys!!
Posted By: JohnRR

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 12:19 AM

70 electrical system is different because of the ignition and hazard in the column , you need to get a 70 schematic first and foremost.
Posted By: moparfan53

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 12:52 AM

Can't give any specific suggestions but you can get the '70 wiring diagram here; http://www.mymopar.com/index.php?pid=27

Here is info about testing the t/s switch and which wire does what.




Posted By: fastmark

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 01:21 AM

It will do funny things if you don't have a good ground.
Posted By: RapidRobert

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 01:25 AM

Quote:

I keep leaning towards the new turn signal switch.


Seperate the pull apart connector & print out both halves of the '70 wiring diagram for your vehicle from mymopar then grab your meter start by checking continuities in the TS half of the pull apart conenctor in neutral/down/up stalk positions and the hazard flasher switch on/off. That'd be where I'd start. Jump fire to the green/brown? in the body half of the pull apart connector, the wires that would go to the rear large filaments in the 1157 bulbs (brake/turn lights). The white wire in the body half of that pull apart connector should be hot when the brake pedal is depressed. Pink (think hot pink ) is the hot in to the brake pedal switch
Posted By: BradD

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 02:08 AM

Push the hazzard switch in and push the dimmer switch once to turn the brights off!

The lamp housings in the front valance need attention also.
Posted By: IMGTX

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 02:50 AM

Check the wiring to and from the ammeter and the thick red and black wires going into the bulkhead connector. Peel back a little wiring covering and check. If those wiring starts to toast it will do really weird things. I could not turn off my side marker lights but I could dim them from the dash dimmer switch last time it happened to me.

Those wires can start to melt from high amperage flow either by electrical loads or overcharging alternators. When they do they melt into other wires and provide current to circuits that could be anything from wipers to hazards and act really freaky.

Good Luck
Posted By: RapidRobert

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 03:25 AM

Working with the TS half of the TS harness connector. with the stalk in neutral there should be continuity between the white wire (which is coming from the brake light switch) and the 2 wires to the R & L rear brake/ts large filaments. with the stalk raised one of those 2 wires should go dead & another seperate one gets hot which is to the TS flasher. With the stalk down the first wire to the rear that went dead should be now be hot again and either the same wire to the flasher that got hot when you raised the stalk or another wire to the same flasher gets hot (I ain't sure/check the diagram). #1 I'd find out if the TS harness/switch mechanism under the st wheel is good or bad & go from there
Posted By: challngr08

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 05:02 AM

Thanks for the replys. The ground thing is a bit irritating considering the car has all of its correct grounds and the tail lamps are working so I know its getting feed and ground. If a ground problem the tail lights wouldn't work. I know this because Ive had numerous intances where the tail panel was painted and the lamps weren't grounded anymore. This seems like circuits are getting crossed somewhere. I doubt seriously that a ground is causing 2 flashers to work simultaneously. Something more is going on. I guess tomorrow is a new day. In fact I may just take a break from it and tackle again on Saturday.
Posted By: RapidRobert

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 05:25 AM

Best thing a mechanic can do sometimes is take a 48 hr break & get regrounded/clear the mind
Posted By: JohnRR

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 02:57 PM

Quote:

Thanks for the replys. The ground thing is a bit irritating considering the car has all of its correct grounds and the tail lamps are working so I know its getting feed and ground. If a ground problem the tail lights wouldn't work. I know this because Ive had numerous intances where the tail panel was painted and the lamps weren't grounded anymore. This seems like circuits are getting crossed somewhere. I doubt seriously that a ground is causing 2 flashers to work simultaneously. Something more is going on. I guess tomorrow is a new day. In fact I may just take a break from it and tackle again on Saturday.




Check the ground on the column , if the car has been incorrectly restored , painted parts of the car that were never originally painted , that will wreak havoc on proper grounds.
Posted By: BradD

Re: 70 Charger Electrical GREMLIN- Hazzards - 03/28/14 07:52 PM

I add a ground strap from the dash to the A-post above the ebrake on every car I work on.

Brad
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