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Started by BWalker82, 18 May 2011, 06:27 PM
Quote from: rumb on 23 August 2022, 04:20 PMJan S. Did you see the message I sent you?
Quote from: Type17 on 05 September 2022, 03:52 PMQuote from: Jan S on 6/30/2022, 11:42:35 PMMy understanding is that the ballast resistors help to regulate the current and the voltage in the ignition system, thereby protecting individual components such as battery, coil, etc.Is that correct?Ballast resistors reduce the voltage to the coil to 10v - coils of cars of this era run at 10v, so that they'll still give a good spark during cranking (when the starter is taking so much power that the voltage drops throughout the system).During cranking, the ballast resistor is bypassed, and receives the full voltage of the electrical system (which is only ~10v, because of the cranking).When you release the key, the ignition switch powers the coil through the ballast resistor again, so it continues to receive 10v while the engine is running.Some cars (Mk1 Golf is one that I know of) don't have visible ballast resistors, but have ballast wire (extra resistance for a voltage drop) in the loom, which is bypassed during cranking by a regular wire.
Quote from: raueda1 on 19 September 2022, 02:05 PMFinish repairing crack on dash
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