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GMC Jimmy Speakers

5 messages,  Last post on Jan 26, 2011 at 8:53 PM

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What is this discussion about? Chevrolet Blazer, SUV

    

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#1 of 5 99 jimmy speakers by mtlwiz

Nov 10, 2008 (6:45 am)

99 jimmy am-fm-cd stock unit, both rear speakers quit at same time. anyone know if theres a common circuit to check or what possibly could do that?

#2 of 5 Speaker problems by duntov

Nov 10, 2008 (7:10 am)

It is usually a short, bad ground or a loose connection that develops over the years. Do not replace the speakers until you have verified that the wiring is good. Move the connections on the radio and the speakers around to see if the speakers will start working.
 
My right hand dash speaker quit and I swapped both speakers from left to right and I moved the wiring around a bit, now both speakers work. Either a loose connection or a short in the wiring to the RH speaker was the cause.

#3 of 5 Re: 99 jimmy speakers [mtlwiz] by jlflemmons

Nov 10, 2008 (3:19 pm)

Replying to: mtlwiz (Nov 10, 2008 6:45 am)
As stated above, check the connections at the rear of the radio, and follow the harness down through the dash checking for damage.
 
While not impossible, the likelyhood of both speakers croaking at the same time is not likely. You could lose the rear channels, however. A cheap but effective trick for checking the wiring and speakers is to pull the radio, and disconnect the speakers from the back. Using a small portable radio, plug into the earphone jack with wire attached and stripped. Then you can connect the wires to each of the speakers and see if you get sound. The little radio will not have enough power to damage the speaker if you connect it backward, and you will know if the speaker and the wiring to it is good.
 
Shadetree radio diagnostics, 101.

#4 of 5 Re: 99 jimmy speakers [jlflemmons] by amysman63401

Jan 26, 2011 (7:15 am)

Replying to: jlflemmons (Nov 10, 2008 3:19 pm)
I have a 98 blazer and both rear speakers blew out. aftermarket stereo when i bought it a year ago. I got new speakers that worked fine for a few months then they went out too. not just scratchy noise but no sound at all out. guess i'll run new wires from stereo to doors?

#5 of 5 Re: 99 jimmy speakers [amysman63401] by jlflemmons

Jan 26, 2011 (8:53 pm)

Replying to: amysman63401 (Jan 26, 2011 7:15 am)
Are you sure the aftermarket radio didn't take them out? Many GM speakers are 4ohm speakers, many aftermarket radios use 8ohm. Radios and speakers need to be matched to avoid one taking the other out.

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