ballast resistor

Tips and help requests for your cars electrics. Post your tips help other sort problems out.

ballast resistor

Postby lancsamb » Tue Jun 30, 2020 11:02 am

does anyone have a picture of where the ballast resistor in the engine bay is i just can't find it on my 1256 hc 1973 but others said i should have one ?
lancsamb
De Luxe Viva
De Luxe Viva
 
Posts: 19
Joined: Thu May 14, 2020 10:30 am
Location: Blackpool

Re: ballast resistor

Postby 1972nail » Tue Jun 30, 2020 11:41 am

There is no ballast resistor as such on an HC, it' a resistance wire that's built into the loom. If fitting electronic ignition it is best to bypass it completely. If retaining points it's best to retain it. You must fit the correct type of coil for the resistor wire ignition and swap it for a non resistor type coil if bypassing the wire.

viewtopic.php?f=12&t=22328&hilit=Bypass
Editor of the VVOC Magazine ReVival

"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
User avatar
1972nail
Old Nail
Old Nail
 
Posts: 3687
Joined: Sun Aug 07, 2011 4:16 pm
Location: Ballymoney Co Antrim - some say....the World's best place to live!

Re: ballast resistor

Postby lancsamb » Tue Jun 30, 2020 1:16 pm

ah that explains as i have a new coil that other members recommended as they said my engine had a ballast resistor as i still have points anyway as i understand the coil starts at 12 volts and then reduces . Thanks for the explanation
lancsamb
De Luxe Viva
De Luxe Viva
 
Posts: 19
Joined: Thu May 14, 2020 10:30 am
Location: Blackpool

Re: ballast resistor

Postby droopsnoot » Tue Jun 30, 2020 6:29 pm

lancsamb wrote:as i understand the coil starts at 12 volts and then reduces


The coil usually runs through the ballast resistor which supplies it with a lower voltage, but during starting there is a bypass wire that runs from the starter solenoid and supplies the full voltage without resistance. As soon as you let go of the key and the starter stops (because the engine is running), the by-pass is disconnected and the lower voltage is present. With the load of the starter, this usually results in about 9-10v during starting, to give a bit of a boost.
My real name: Mike. My web site: http://www.firenza.net

My stuff for sale: http://www.firenza.net/forsale.shtml
droopsnoot
Old Nail
Old Nail
 
Posts: 2421
Joined: Mon Oct 31, 2005 2:08 pm
Location: Cheshire

Re: ballast resistor

Postby lancsamb » Tue Jun 30, 2020 7:17 pm

again great to be a member of this club with members with so much knowledge thank you
lancsamb
De Luxe Viva
De Luxe Viva
 
Posts: 19
Joined: Thu May 14, 2020 10:30 am
Location: Blackpool


Return to Electrical help

Who is online

Users browsing this forum: No registered users and 1 guest

cron