Diagnostic Manual, Info./Comm., Volume 1
Electrical Test Program - Preparation for Test
|1. Battery voltage 11-14 V.
2. Check fuses.
3. Radio OK.
4. Connections to N40/3 OK.
5. Balance, fader, bass and treble adjusted to mid-range setting.
6. Vent ports on door speaker enclosures are free of obstructions (vent ports located on underside of interior door panels).
To prevent damage to the radio and left/right audio power amplifier, the connectors must only be removed or installed with the ignition and
radio OFF .
Electrical wiring diagrams :
Electrical Troubleshooting Manual, Model 140
Conventional tools, test equipment
||Brand, model, etc.
|Digital multimeter 1)
||Fluke models 23, 83, 85, 87
|1) Available through the MBUSA Standard Equipment Program.