Opel GT Ignition Switch problem Diagnosis Guide Pdf

Filename: Opel GT Ignition Switch problem Diagnosis Guide
Language: English
File : PDF
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Opel GT Ignition Switch problem Diagnosis Guide~The Opel GT Ignition Switch is prone to internal resistance buildup & premature failure, due to a primitive circuit design which routes up to 30 amps from the battery through it, when the starter is cranking. (In the mid-1960’s, Opel rummaged through the parts bin, using the switch from the Opel Admiral, and some parts from French sources. In quality terms, think: Renault). Typically, there’s a puff of smoke, and you’re stranded. To help prevent this, the Opel GT Ignition Switch can be tested, either in the car (using key to turn) or off the car (using a screwdriver to turn), with a simple ohm meter. Use a common volt-ohm meter, to test the switch in the “start” position. Connect one test lead to the end of the solid red wire (A) and another to the end of the striped red/black wire (B). (See: “Fusebox View”). Release the switch for a moment. The ohms should revert back to infinity. If it doesn’t (if
measurement goes back and forth), the switch may have poor internal circuit isolation, which ndicates carbon buildup or overheated parts. (If so, spray-cleaning may provide a quick-fix). If the ignition switch is verified to be in working condition, the first protective action recommended is to install a protective 4-prong 30 amp relay in the starter circuit. An inexpensive relay will take up the brunt of the current when the starter is powered, keeping it out of your valuable original GT ignition switch. To install, you will need to assemble a harness, with 3 short wires, 4 clip ends and 2 eyelet connectors, to connect to 3 relay terminals, 1 solenoid terminal, 1 round solenoid battery post, and a (suggested) round ground on the chassis. The existing ignition connection will be transferred from the starter solenoid to the new relay (per schematic).
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