• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

4 prong ballast with electric choke

SlinktRR

SlinktRR

Well-Known Member
Local time
8:53 AM
Joined
Aug 27, 2012
Messages
1,369
Reaction score
772
Location
Dallas TX
my car now has an m&H harness with leads for the 4 prong ballast resistor. So i have the stock 4 prong with a Mopar chrome box, and it works great with a firecore dist and blaster 2 coil. The harness is great, everything works again.. even the clock on the tic toc tach, which i was surprised by. However, i plan to run deeper into the cold weather this year and need to hook the aftermarket electric choke back up for faster starts.

Can i splice off one or both of the 12v side of the resistor or somewhere else? Also, anyone know what the significance of the 4 prong is vs. the 2? Should i just cut the m&h connectors and go back to a 2 prong?
 
Factory made it straight from the blue ign 1 power line. Since it seems you got a 70 and should get a blue field wire to the alt, you can get it from that line down the harness tape to make a short line wire. On 73 and lates it was made on that way to feed the electric choke control unit mounted on one of the intake manifold bolts
 
Last edited:
Thanks, so if I have this correct...if I'm using the chrome ECU, it is 4 wire ECU and if the engine harness uses a 4 prong ballast resistor connection, then only one 12V lead to that ballast resistor will be hot and the other lead will be 0V.

For the choke I should splice the blue field wire on the alternator which would be 12+V, similar to the ballast resistor feed... but will not be in the ECU circuit.
 
we usually run the power for the choke off the wiper motor connector from the bulkhead, that line has a fuse in it already.
 
Last edited:
moes said:
we usually run the power for the choke off the wiper motor connector from the bulkhead, that line has a fuse in it already.
Click to expand...

no need for that.

SlinktRR said:
Thanks, so if I have this correct...if I'm using the chrome ECU, it is 4 wire ECU and if the engine harness uses a 4 prong ballast resistor connection, then only one 12V lead to that ballast resistor will be hot and the other lead will be 0V.

For the choke I should splice the blue field wire on the alternator which would be 12+V, similar to the ballast resistor feed... but will not be in the ECU circuit.
Click to expand...

don't overthink that. Just splice it from the blue wire wherever on engine harness and done.

ballast is allways hot on both sides, at diff voltage rates depending on the ign switch stage, but allways hot
 
Thank you Nacho, blue field sounds like a good power source I'll tie into there.
 
this is what factory made on 73 and lates ( 73 diagram ilustrated ) I made this diagram long time ago.

Engine harness got the provision set for the choke control unit on the run up to the alt brush

index.php?action=dlattach;topic=49810.jpg
 
Last edited:
Who knows how to test the choke control switch? Should it always have continuity between the two spade connectors?
 
I found it just after I posted my question.

20190105_191022.jpeg
 
Last edited:
You must log in or register to reply here.

Similar threads

dadsbee
Electric choke killing ignition!
2 3 4
Replies
60
Views
4K
dadsbee
dadsbee
65PlymSatellite
65 satellite killing coils.
2 3 4
Replies
72
Views
4K
Bee1971
Bee1971
PurpleBeeper
Six Pack "Manual" Servo Choke
Replies
9
Views
999
72RoadrunnerGTX
72RoadrunnerGTX
66fs
  • Locked
SOLD 1985 QuadraJet Carb 170854408 truck 360 auto trans with electric choke
Replies
0
Views
346
66fs
66fs
S
Having problems with new MSD plug-n-play distributor and blaster 2 tube coil kit from Jegs. Installed into70 Bee with previous electronic ignition?
2
Replies
24
Views
2K
SuperBeeFan
S
Auto Transport Service
Back
Top