Hi All,

After a bad day having some new tyres fitted, I think my amp may be dead

I've checked all connections and fuses and all seems okay.

I've checked:

Fuses in the amp
Fuse at the battery side
Connections on both amp/sub/stereo

All seems okay, but no power from amp meaning no front speakers and no sub.

Can anyone suggest what might the problem?

All I can think is that the sub wires have connected whilst the sub was out, causing it to short...but i wasnt aware this was a problem.

Thanks in advance, any advice is appreciated after a **** day with the car, and the fact my amp is far from cheap

Thank you,

Sam

you got a volt meter?


you was very lucky leaving wires floating about in the boot if they short the high ampage involved has been know to cause fires....

no i've not got one but can get hold of one if need be.

could it be possible that the sub wires made contact and shorted the whole system?

Checked remote wire and ground are secure ?.....

well first things first...

use your multimeter to do a contiunity / resistance test of the earth it should read practically zero on the ohm's (dont forget to disctiminate the test leads resistance

(touch the probes together and say it gives 7.0 ohms deduct that from your reading) it should be next to sod all...

or if it has a diode (beeping) test use that between your ground / earth cable and the car body.... (clean bit of metal)


next test between your known working ground wire and the constant live using the dc scale it should read 12v ish....


next test the remote wire this should have 12v when turned on and 0 when turned off.......

Right will test tonight or tomorrow whenever I can get hold of a multimeter. Im hoping it is just a ground connection! thanks both, will let you know what sort of readings i get.

Okay andy iv got a multimeter at home now but if im honest, not sure what im doing (i know its simple stuff, but there you go)

Could you explain where im putting the probes to test the resitance on the earth?

"use your multimeter to do a contiunity / resistance test of the earth it
should read practically zero on the ohm's (dont forget to disctiminate the test
leads resistance"

Click to expand...

clean unpainted body work eg wheel bolt to end of your earth lead

Right, found the problem and fixed it so here's what it was incase it will help anybody or something.

After looking at the battery side connection, we found that the positive power cable had come away from the actual battery connection (connection was still attached with no cable) and so this was half the battle.

Once reconnected, the amp was tested for power going in, this was fine, however no light was on.

Once we had ruled out earths etc, we checked the manual and if the amp had been shorted etc, a red light would show. we were seeing no light, red or green.

So we tested the 'remote wire', there was nothing on this and after tracing, we found the cable had been snapped internally and so an extension was used to replace the break.

It was just pure coincedence that the battery side connection had broke on the same day I think.

Problem solved though - dont know if this will help anyone, but thought id post anyway.