BE/Body Electrical System, page 102

BE-102     BODY ELECTRICAL SYSTEM — Radio, Stereo Tape Player and Antenna

TEST 2

Proceed to Test 3.
Yes

Are all connectors behind radio and tape player properly connected? → Yes → Is there power to radio and player connectors? → Yes → Are radio and player properly connected?
↓No                                                           ↓No                                                    ↓No
Connect properly.                                    Inspect and repair power wire                 Properly re-install
                                                              harness to radio and player.

TEST 3

Are speaker connectors connected? → Yes → Temporarily install another speaker. → OK → Replace Speaker.
↓No                                                                                    ↓No
Connect properly.                                                            Is there continuity in speaker wire harness? → Yes → Replace radio and tape player.
                                                                                        ↓No                w/o  Player
                                                                                        Inspect and repair speaker wire harness. → Proceed to Test 1 of following item.