Wiring a electric choke with a Ford alternator

junkyardjeff · June 16, 2021, 10:30:32 PM

If my memory is correct when a Ford car has a electric or electric assist choke its wired to the alternator so where is it hooked up.

Crosley.In.AZ · June 17, 2021, 12:26:42 AM

Many OEM vehicle used electric warmed up chokes in the day. They need 12v power when the engine is running. I have never seen one of these chokes wired to the alternator as I recall

sirstude · June 17, 2021, 08:49:17 AM

I have always wired the electric choke to the hot side of the wiper motor. It's handy and fused.

tomslik · June 18, 2021, 03:04:18 PM

used to use the white wire at the alt on 60's fords...did't want to have power to the choke if the motor wasn't running.
this was a while ago and my memory may not be working correctly...

junkyardjeff · June 18, 2021, 11:08:37 PM

I thought I remembered the wire going to the alternator,I always put a manual choke carb on and never paid any attention to where the wire actually hooked up.

Crosley.In.AZ · June 19, 2021, 09:22:06 AM

Quote from: "tomslik"used to use the white wire at the alt on 60's fords...did't want to have power to the choke if the motor wasn't running.
this was a while ago and my memory may not be working correctly...

Piggy back on to the eggciter wire to the alternator eh? Never seen that. Very good. Thanks for visiting the RRT

tomslik · June 24, 2021, 08:51:31 AM

Quote from: "Crosley"
Quote from: "tomslik"used to use the white wire at the alt on 60's fords...did't want to have power to the choke if the motor wasn't running.
this was a while ago and my memory may not be working correctly...

Piggy back on to the eggciter wire to the alternator eh? Never seen that. Very good. Thanks for visiting the RRT

ford did it from the factory
i try not to use a B+ supply as if you just be sitting there with the key on, the chock will come off
speaking of which, i've got a 68 camaro (not mine)that i need to do that to....

wayne petty · June 25, 2021, 02:53:37 AM

ford used the STATOR voltage STA on the alternator or S on the regulator to supply current to the electric choke thermostat..

the stator has current only when the alternator is charging.. and it will have almost exactly half of the alternator output but in AC volts not DC..

and this will NOT effect charging voltage at all..

the voltage regulator uses the Stator waveform as a tachometer signal to keep the field output from the regulator at the same duty cycle to control the rotor windings to keep the charging system from surging when you rev up the engine..

the Field output from the regulator does not just pulse Positive voltage to the spinning rotor winding.. it pulses Positive to increase the rotor field strength.. and it pulses Negative to dampen the rotor field strength.. perhaps 3 times per alternator revolution.

slightly off thread.. but everybody should have printed copies of this test.. https://i.imgur.com/kviX0VQ.jpg

i assembled that almost 20 years ago. i have reduced my alternator failures to almost zero. by reducing voltage drops.. i find that even computerized cars work better..

junkyardjeff · June 26, 2021, 12:06:15 AM

Found out I had a factory wiring diagram for this car and hooked it up to the white wire with the black strip and the choke would not open,carb came off a car that sat for many years in a junkyard so the thermostat is probably junk and probably will not be able to find one so will probably be converted to a manual choke.