Where does a ballast resistor go?

Note: Ballast resistors are usually located bolted to the firewall if your distributor and/or coil is at the rear of the engine. If your distributor is located near the front or side of the engine in the case of an inline-4 cylinder, then it’s probably right near the ignition coil or distributor.

Is a ballast resistor necessary?

So does your application require a ballast resistor? Quite simply, if your distributor has breaker points the answer is yes; if not, the answer is no. See all 7 photos 2 Older points-style ignition system used a single resistor which reduced amperage to the coil resulting in extended life for the coil and points.

How do you wire a ballast resistor to a coil?

Strip the end of the positive wire from the ignition, and connect it to the positive end of the resistor. From the other terminal on the resistor a wire goes to the positive on the coil. Make sure to attach securely to the connecting terminal, by wrapping the wire around the post and tightening with a screwdriver.

How do I know if my ballast resistor is bad?

Symptoms of a Bad or Failing Ballast Resistor

  1. Vehicle starts, then immediately dies. The most obvious symptoms will be the vehicle starts, but then immediately dies as soon as you release the key.
  2. Not starting at all.
  3. Don’t jump the resistor.
  4. Let the vehicle be.

How do you fix a ballast resistor?

Connecting a ballast resistor is a fairly straightforward project, but you will want to pay attention to the wiring.

  1. Step 1: Determine if Ballast Resistor Is Needed.
  2. Step 2: Locate Ballast Resistor along Firewall.
  3. Step 3: Drill Holes for Securing Resistor.
  4. Step 4: Install Ballast Resistor.
  5. Step 5: Connect Wires to Positive.

What happens when a ballast resistor fails?

If your ballast resistor is bad, your vehicle will not run and you will have to have it towed to the mechanic’s shop. The biggest sign your ballast resistor is bad is your vehicle will start, but immediately stop as soon as you let go of the key.

How do you tell if a coil needs a resistor?

How do you tell if a coil needs a resistor? To find out for sure, use a multimeter to check the voltage on the positive wire of the coil with the ignition on. You can test the resistance of the coil using a voltmeter and measure the Ohms (resistance) across the +’ve and –’ve terminals.

Which wire goes to distributor from coil?

For positive ground the “+” terminal goes to the distributor (to be grounded on the engine block). For negative ground the “-” terminal goes to the distributor (to be grounded on the engine block). The ignition coil is the part of your engine that produces high voltage in order to power your cylinders.