Where does the positive on the choke connect?

[m3talc0re]

On my 83 GMC Sierra classic, where does the positive on the electric choke connect to?

[VileZambonie]

To the terminal on the choke coil.

[m3talc0re]

Smartass -_-

And the other end?

[zieg85]

It is part of the engine loom passenger side, same loom that goes to the alternator

[VileZambonie]

You can view the wiring diagrams here:

http://forum.73-87chevytrucks.com/smforum/index.php?topic=25639.0

[rich weyand]

It goes to an oil pressure switch on the back of the engine, such that it is only energized when the engine is running.  Windshield wiper motor hot lead, I believe, is also connected there.

You can also connect it directly to the ignition wire, as long as you understand that sitting there with the key on and the engine not running will heat up the choke spring eventually turning off the choke.

[m3talc0re]

Thanks. I'd like to have it connected to where it's supposed to be connected, lol. I'll try to find that switch this afternoon, hopefully..

[m3talc0re]

What does the ground go to? Is it supposed to be connected to a switch in the thermostat housing?

I'm very confused atm. Right now, nothing is connected to the choke. So is the choke stuck open? The engine runs fine once warmed up, but when cold, I have to keep my foot in the throttle a little to keep the engine running.

[VileZambonie]

It's a single wire and the choke heater is grounded through the engine ground. If nothing is hooked up it will not function.

On most vehicles, an electric assist choke is incorporated onto the carburetor to aid in reducing the emissions of hydrocarbons (HC) and carbon monoxide (CO) during starting and warm-up (choke-on) period. The electric assist choke is designed to give a more rapid choke opening at temperatures of approximately 60-65°F., or greater and a slower choke opening at temperatures of approximately 60-65°F., or below. The electric assist choke system does not change any carburetor service procedures and cannot be adjusted. If the system is out of calibration, the heater control switch and/or choke unit must be replaced.
The main components of the electric assist choke system, Fig. 39, consist of a thermostatic coil, ceramic resistor, cover, bi-metal snap disc and contact spring. The electric actuated ceramic resistor heats the thermostatic coil, gradually relaxing coil tension and allowing the choke valve to open.
At air temperatures below 50°F., electric current applied to the small section of the ceramic resistor, allows slow opening of the choke valve for good engine warm-up. As the small section of the ceramic resistor continues to heat, a bi-metal disc causes the spring loaded contact to close and apply electric current to the large section of the ceramic resistor which increases the heat flow to the thermostatic coil for more rapid opening of the choke valve.
At air temperatures between 50-70°F., electric current applied to the small section, or both the small and large sections of the ceramic resistor, will produce the amount of heat required to control the choke valve position for good engine operation in these temperature ranges.
At air temperatures above 70°F., electric current applied to the small section of the ceramic resistor and through the spring contact to the large section of the ceramic resistor, provides rapid heating of the thermostatic coil for quicker choke valve opening when leaner air-fuel mixtures are required at warmer temperatures.

Diagnosis & Testing
Possible conditions for the electric choke not operating properly are listed as follows (use a voltmeter to check oil pressure and choke coil circuits):
Low or no engine oil pressure.
Faulty oil pressure switch.
No current to oil pressure switch due to:
Burned out fuse.
Broken wire to oil pressure switch.
No current between choke and oil pressure switch due to:
Broken lead wire.
Wire terminal not properly secured on coil terminal.
Faulty ground circuit between choke assembly and housing grounding plate.
Faulty choke coil assembly.
If it is determined that the choke coil assembly is inoperative, the following test must be made:
Remove choke coil from carburetor. After removal of choke coil, allow coil to cool to room temperature.
Connect a ``jumper'' wire between positive battery terminal and choke coil terminal assembly. Connect a second ``jumper'' wire between negative battery terminal and choke coil assembly grounding plate.
The tang on the choke coil should rotate 45°in 54-90 seconds.
If choke coil does not rotate or exceeds the 54-90 second time limit, replace choke coil.
If coil is within specification, check steps 1 thru 5 for possible cause.

[m3talc0re]

I went out and looked while on lunch and it looks like the choke is just staying open. Moving the linkage on either direction gives me no resistance or spring back. Does that mean the choke assist module (name?) is broken?

[VileZambonie]

It means someone probably set it so it's always open.

[m3talc0re]

How did they do that exactly? Dismantle the choke module?

[82silverado]

On the side of the electric choke there are 3 fasteners. Loosen them and the center piece in the housing will rotate.

[m3talc0re]

For the life of me, I cannot find the oil pressure switch where this thing should be connected...

[Irish_Alley]

above the oil filter or drivers side of distributor. im not sure where they connect to the choke never seen it like that. i know thats how its supposed to be be but ive never seen a stock setup and paid attention to that