Test C: Radio Noise Is Excessive

NOISE DIAGNOSIS TEST

Test K: Noise Diagnosis:

Refer to figure for Noise Diagnosis.

Installing a ground strap

Fig. 1 Installing A Braided Ground Strap:

To install a braided ground strap to Radio, cut the ground wire and run a braided ground starp from the case of the radio to a good, unpainted body ground, Fig. 1.

Installing a filter package

Fig. 2 Installing A Filter Package:

Refer to Fig. 2 for procedure to install filter package.

Installing a by-pass capacitor

Fig. 3 Install A By-pass Capacitor:

Install a 250 MFD 100V capacitor on the generator output lead, Fig. 3.

IGNITION NOISE

1. Check for loose or defective spark plug wire.
2. Check for defective spark plug.
3. Move all wiring away from ignition wires.
4. Reroute spark plug wires lying against anything that could possibly transmit noise to the Radio (car wiring or sensor leads that travel into the passenger compartment).
5. Check the ground from engine to dash. Install a braided ground strap if necessary.
6. Check heater core ground. Clean or install a braided ground strap if necessary.
7. Check air conditioner accumulator ground. Clean or install a braided ground strap if necessary.