Test Equipment

Many of the tests of ignition system components require the use of high-impedance test equipment to prevent damage to the electrical components. An LED test light which meets these requirements is Volkswagen special tool no. US 1115, available from an authorized Volkswagen dealer parts department (order no. TU1 115 000 28 ZEL). A multimeter (for voltage, current, and resistance measurements) which meets these requirements is Volkswagen special tool no. US 1119, a digital multimeter (order no. TU1 119 000 00 KTM).

Many tests require checking for voltage, continuity, or resistance at the terminals of the components' harness connectors. The blunt tips of a multimeter's probes can damage the terminals, and cause poor connections. To prevent damage, use flat male connectors to probe the harness connector terminals. A suitable flat connector is Volkswagen part no. N 017 457 02. Volkswagen also has a special tool set, no. V.A.G. 1594, which contains a number of special adaptors for making connections that will not damage connectors during electrical testing.