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Anonymous Posted on Oct 20, 2012

Faulty Ballast Resistor

I had problem related to Ballast resistor,one of the fixya expert provided me with help link to confirm the fault:----- How to Test and Replace Ballast Resistor in Car? http://repairhelpcenter.blogspot.com/2011/12/how-to-test-and-replace-ballast.html ============ These link helped me,thanks.More help is appreciated.

1 Answer

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  • Master 580 Answers
  • Posted on Oct 20, 2012
Anonymous
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Joined: Oct 05, 2012
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When running it goes well but to start needs a jump lead connecting the positive terminal on the battery to the positive terminal on the coil. Without that it just doesn't produce enough voltage at the moment, but when the new coil etc was fitted a couple of weeks ago it was producing what it should I think and started ok for about 4 or 5 times.

I am wondering if it can be related to the ballast resistor.

It is a MK2 car so shouldn't have a seperate one I think but have it incorporated into the loom - am I right? Mine has a seperate one and I am wondering if there is one in the loom too.

Could having a seperate one short / burn out the coil? Any other thoughts?

5 Related Answers

Anonymous

  • 1010 Answers
  • Posted on May 15, 2008

SOURCE: turns over but won't start

Is the rotor turning in the distributor? If so, most likely the problem is in the madnetic pickup in the distributor. If not, pull the distributor out and see if the gear on the shaft is broken. A good gear on the distributor and the distributor not turning means you need a timing chain!!!

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Anonymous

  • 1 Answer
  • Posted on Mar 05, 2009

SOURCE: dead dodge

You need a new coil my friend.

Anonymous

  • 1 Answer
  • Posted on Sep 30, 2009

SOURCE: Ballast Resistor re-wiring '87 dodge Ram 50

I have just wired the ballast to the coil on my 84 D-50 all but two wires...is yours fixed yet or still need help?

Anonymous

  • 7353 Answers
  • Posted on Oct 07, 2009

SOURCE: Chrysler Sebring LXi V6 Ballast Resistor

there isnt one, what is the problem.

roniecon

Ronny Bennett Sr.

  • 6988 Answers
  • Posted on Jun 15, 2010

SOURCE: How to test and replace a HID ballast in headlight

Swap the left head light for the right headlight,if it still does not light up,on the side that you are having problems with,then the ballast is bad,That is,if it is a new bulb.

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Does a 1951 Plymouth Cranbrook have a primary resistor that has to do with starting the car?

Older cars had a ballast resistor to limit the voltage to the ignition coil in order to prolong the life of the coil. The way it was set up, when the starter was engaged, the ballast resistor was bypassed, providing full voltage to the coil for a 'hot' spark. Once the engine was running, current to the coil was routed through the ballast resistor. I think this was usually accomplished in the ignition switch - full power in 'Start' position, through the ballast resistor in the 'Run' position.
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Ballast resistor

Ballast resistors were used to reduce voltage across the contact points after start so the points didn't 'burn' so quickly. As there are no points in your engine, there is no ballast resistor.
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I would say ballast resistor, this is a resistor used to reduce power at the coil from 13.8 volt down to usually 9 volt. this allows an engine to have extra voltage for starting and run on the lower voltage. ballast resister faulty it runs out of spark when you disengage the starter
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I have a 1985 plymouth gran fury that has no spark. I replaced coil and test for proper volts. Replaced Distributer cap and rotor, new pick up, new plugs, new ECU mounted on air box, tested fusible links,...

Check out this site: https://www.allpar.com/forums/topic/40994-ballast-resistor/

Seems to be some debate as to whether or not your car even has a ballast resistor, and if it does, where it may be located. I've always seen ballast resistors mounted on the firewall away from the engine's heat...but those were on older models (50's, 60's 70's). Good luck.
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Heater fan only works on hight. 2004 hyundai santa fe

This problem is related to faulty blower motor resistor.The resistor is the part which controls the blower motor to work on required speeds.But if resistor fails then motor will work normally but will not work on selected speed like slow and medium .In this case replacing the resistor should help.To locate the resistor open your glove box and roll it all the down take off the panel in behind the resistor will be top right hand side.This should help.Thanks.Helpmech.
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The heater not working.This problem is related to few possibilities 1) The thermostat can be faulty. 2) the heater blower motor resistor is faulty 3) The heater blower motor it self is faulty. ------------ The The blower resistor is behind glove-box on plenum.Connect the 12 volt battery directly to the heater blower motor and see,if the motor runs then its faulty resistor or thermostat.but if no motor running then its faulty motor. The thermostat is located at the top front of the engine.For easy access follow the top radiator hose.The top radiator hose goes in engine .Take that hose out and thermostat will be seen inside. --------- The thermostat and resistor are not very costly part.So you can directly replace them and see if its helping.First confirm motor is working,by directly by passing the blower motor to 12 volt battery. ------------ This will help.Thanks.Helpmech.
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1988 jeep comanche will start only when you hold tumbler in the start position, when you relese it, engine stops.. engine is a 4.0 auto, fuel injected 4x4

If the car has a resistor coil with a ballast resistor to drop voltage from 12 to 8 then check the resistor wiring. When you engage the starter tumbler it by passes the ballast resistor and sends 12 volts straight to the eight volt coil to get good spark. When you release it the 12 volts goes through the resistor to 8 volts and then the coil. If there is a fault in this circuit the engine stops. Jump the 12 volts straight to the coil and start it. If it keeps going the ballast circuit is faulty. Paul
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