Speakers Inoperative - One or More. Oldsmobile Intrigue 2000

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For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 2000 🢒 Intrigue 🢒 Body and Accessories 🢒 Entertainment 🢒 Speakers Inoperative - One or More

Speakers Inoperative - One or More W/O U85

Step

Action

Value(s)

Yes

Turn ON the ignition switch .
Turn ON the radio.
Set the radio volume at mid range.
Connect a DMM (set to measure AC voltage) by backprobing between the low frequency audio amplifier connector C2 terminal B9 and the following terminal based on the inoperative speaker:

•	Left Front Speaker: B5

•	Right Front Speaker: B6

•	Left Rear Speaker: B7

•	Right Rear Speaker: B8

Is the voltage measured within the specified range?

0.1-3 V AC

Go to Step 3

Go to Step 2

Test for an open, short to B+ or short to ground in this circuit, based on the inoperative speaker:

•	Left Front Speaker: circuit 511

•	Right Front Speaker: circuit 512

•	Left Rear Speaker: circuit 599

•	Right Rear Speaker: circuit 546

Did you find a poor connection, a short to B+ or a short to ground in the circuit?

Go to Step 7

Go to Step 8

Play the radio with the volume at mid range.
Connect a DMM (set to measure AC voltage) by backprobing between these terminals at the low frequency audio amplifier, based on the inoperative speaker:

•	Left Front Speaker: C2/A11 and C2/A12

•	Right Front Speaker: C2/A7 and C2/A8

•	Left Rear Speaker: C1/B and C1/G

•	Right Rear Speaker: C2/A9 and C2/A10

•	Left Rear Speaker (Sub-Woofer): C1/C and C1/F

•	Right Rear Speaker (Sub-Woofer): C1/D and C1/E.

Is the voltage measured within the specified range?

0.1-10 V AC

Go to Step 4

Go to Step 9

Turn OFF the radio.
Turn OFF the ignition switch.
Disconnect the low frequency audio amplifier connectors C1 and C2.
Using a DMM, verify the resistance at low frequency audio amplifier harness connector terminals, based on the inoperative speaker:

•	Left Front Speaker: C2/A11 and C2/A12: 2.6ohms

•	Right Front Speaker: C2/A7 and C2/A8: 2.6ohms

•	Left Rear Speaker: C1/B and C1/G: 4ohms

•	Right Rear Speaker: C2/A9 and C2/A10: 4ohms

•	Left Rear Speaker (Sub-Woofer): C1/C and C1/F: 2.5ohms

•	Right Rear Speaker (Sub-Woofer): C1/D and C1/E: 2.5ohms

Is the resistance measured the same as the specified values shown above?

Go to Step 5

Go to Step 6

Test for a short to B+ or a short to ground in these circuits, based on the inoperative speaker:

•	Left Front Speaker: circuits 118 and 201

•	Right Front Speaker: circuits 117 and 200

•	Left Rear Speaker: circuits 116 and 199

•	Right Rear Speaker: circuits 46 and 115

•	Left Rear Speaker (Sub-Woofer): circuits 346 and 1794

•	Right Rear Speaker (Sub-Woofer): circuits 315 and 1795.

Did you find a short to B+ or a short to ground in any of the inoperative speaker circuits?

Go to Step 11

Go to Step 10

Disconnect the inoperative speaker.
Using a DMM, measure the resistance between the speakers terminals.

•	Front Woofers: 2.5ohms

•	Rear Tweeters: 4ohms

•	Rear Sub-Woofers: 2.5ohms

Is the resistance measured the same as the specified values shown above?

Go to Step 12

Go to Step 10

Repair the faulty circuit between the radio and the low frequency audio amplifier.

Is the repair complete?

Go to Step 13

Replace the radio. Refer to Radio Replacement .

Is the repair complete?

Go to Step 13

Replace the low frequency audio amplifier. Refer to Radio Speaker Amplifier Replacement .

Is the repair complete?

Go to Step 13

Replace the inoperative speaker. Refer to Radio Front Speaker Replacement or Radio Front Side Door Speaker Replacement or Radio Rear Speaker Replacement .

Is the repair complete?

Go to Step 13

Repair a faulty circuit between the low frequency audio amplifier and the inoperative speaker.

Is the repair complete?

Go to Step 13

Repair a poor connection or an open between the low frequency audio amplifier and the inoperative speaker.

Is the repair complete?

Go to Step 13

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1

Speakers Inoperative - One or More W/ U85

Step	Action	Value(s)	Yes	No
1	Turn OFF the ignition switch. Disconnect the low frequency audio amplifier connector C1. Using a test light, connect between the low frequency audio amplifier harness connector C1 terminal H and ground. Does the test light illuminate?	--	Go to Step 2	Go to Step 6
2	Using a test light, connect between the low frequency audio amplifier harness connector C1 terminal A and terminal H. Does the test light illuminate?	--	Go to Step 3	Go to Step 7
3	Disconnect the low frequency audio amplifier connector C2. Turn ON the ignition switch. Using a DMM, measure the voltage between the low frequency audio amplifier harness connector C2 terminal A1 and ground. Is the voltage measured within the specified range?	B+ (10-14 V)	Go to Step 4	Go to Step 5
4	Reconnect the low frequency audio amplifier. Using a DMM set to measure A/C voltage, connect by backprobing between the low frequency audio amplifier harness connector C2 terminal B5 and terminal B9. Turn the radio volume at mid-range. Observe the voltage measured using the DMM. Is the measured voltage within the specified range?	0.1-3 V AC	Go to Step 10	Go to Step 11
5	Turn OFF the ignition switch. Using a DMM, measure the resistance between the radio harness connector terminal E3 and the low frequency audio amplifier harness connector C1 terminal A1. Is the resistance measured less than the specified value?	2ohms	Go to Step 8	Go to Step 9
6	Repair a poor connection or an open in circuit 640. Is the repair complete?	--	Go to Step 12	--
7	Repair a poor connection or an open in circuit 351. Is the repair complete?	--	Go to Step 12	--
8	Replace the radio. Refer to Radio Replacement . Is the repair complete?	--	Go to Step 12	--
9	Repair a poor connection or an open in circuit 314. Is the repair complete?	--	Go to Step 12	--
10	Replace the low frequency audio amplifier. Refer to Radio Speaker Amplifier Replacement . Is the repair complete?	--	Go to Step 12	--
11	Test for a poor connection or open between the radio and the low frequency audio amplifier circuits 314, 511, 512, 546, 599, and 1946; repair as needed. If these circuit are OK, then replace the radio. Refer to Radio Replacement . Is the repair complete?	--	Go to Step 12	--
12	Operate the system in order to verify the repair. Did you correct the condition?	--	System OK	Go to Step 1