Coil ignition question? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Als454 · 07-30-2002, 10:52 PM

Hey guys! On the coil ignition system on some of the older vehicles what is the white block that appears to be a resistor and what part does it play in the ignition system?

Thanks

*Zkast* · 07-30-2002, 11:15 PM

It's exactly that.. a resistor. Balast resistor to be correct. Mostly used by chrysler, its used to reduce the 12v battery voltage down to 6-8 volts for the ignition coil.

Gm usually used a resistor wire and not a block.

Als454 · 07-30-2002, 11:21 PM

What is the possibility of this thing going bad. Buddies boat won't fire. No spark to plugs. Put a known good coil in it ect. ect. Looking at this resistor now?

*Zkast* · 07-31-2002, 12:17 AM

With a volt meter, check the voltage going into the block and coming out. You should see about a 30% decrease in voltage.
If you have 12 going in you should have (6-7 roughly) coming out

07-30-2002, 10:52 PM	#1
Als454 Senior Member Join Date: Jan 2002 Location: Vienna, Ohio, USA Posts: 259	Coil ignition question? Hey guys! On the coil ignition system on some of the older vehicles what is the white block that appears to be a resistor and what part does it play in the ignition system? Thanks __________________ 72 Chevy A/C P/B P/S Tilt 454 Engine 400 TCI Trans C30 Frame C10 Suspension Short Wheel Base (Dually)

07-30-2002, 11:21 PM	#3
Als454 Senior Member Join Date: Jan 2002 Location: Vienna, Ohio, USA Posts: 259	What is the possibility of this thing going bad. Buddies boat won't fire. No spark to plugs. Put a known good coil in it ect. ect. Looking at this resistor now? __________________ 72 Chevy A/C P/B P/S Tilt 454 Engine 400 TCI Trans C30 Frame C10 Suspension Short Wheel Base (Dually)

07-30-2002, 11:15 PM	#2
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	It's exactly that.. a resistor. Balast resistor to be correct. Mostly used by chrysler, its used to reduce the 12v battery voltage down to 6-8 volts for the ignition coil. Gm usually used a resistor wire and not a block.

07-31-2002, 12:17 AM	#4
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	With a volt meter, check the voltage going into the block and coming out. You should see about a 30% decrease in voltage. If you have 12 going in you should have (6-7 roughly) coming out



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