Question about 1990 Chevrolet Suburban
Hi. The white wire hanging. on cheevrolet.on the seem connector in the ignition coil. is for a thacometer. signal.
When you want to put a aftermaket thacometer,
or for a Tester to check idle based on RPM.
I hope this help OK>
Posted on Jul 06, 2008
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Posted on Jan 02, 2017
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Please see my tip at http://www.fixya.com/cars/r6223989-ignition_coil_doesn_t_spark . These are generic instructions--specific instructions are pasted below from Autozone.com. If you get stuck, please get back to me.
Use a test light to check for power to the coil on the black wire with a yellow stripe--see procedure below and other tests you can run. You will need a volt-ohm meter to run most of these tests.
The system used on 1990-95 Accords and 1989-95 fuel injected Preludes uses the distributor components to signal the engine computer. The ECU triggers the spark through the igniter unit and coil. This spark timing is controlled by the computer as an integrated function of the fuel management system. The distributor contains a crankshaft angle sensor and a No. 1 Cylinder Top Dead Center (TDC) sensor. Using these and other electrical inputs, the computer controls spark timing electrically.
1990-91 ACCORD Fig. Fig. 6: Terminal identification on 1990-91 Accords
See Figure 6
See Figure 16
Fig. Fig. 6: Terminal identification on 1990-91 Accords
Fig. Fig. 16: Coil terminal designation on 1990-91 Accords
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