Checking grounds for stereo

Started by R Dubya, March 30, 2006, 03:19:34 PM

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R Dubya

So my TGP has a buzzing sound coming through the speakers when it's running, and only when its running.  Sitting with key on but engine off no sound.  I am thinking ground but wondered if anyone has an idea on the best place to start looking?
Ryan Warren
'89 TGP
It doesn't run anymore.

z284pwr

Alternator noise interference.....

Question, is the radio still stock?  I would assume so?  If so, it may be ending its life as a useful radio.  Mine was doing the exact same thing.  Unless its aftermarket?

R Dubya

No it is stock.  I don't know I guess it could be the problem, I was really hoping to avoid replacing the unit, wanted to keep it stock but I guess I will be looking into a replacement as well.

I mean you can hear the turbo spool up through the speakers when the music is low, when it's loud you don't hear so much but it's still there. 
Ryan Warren
'89 TGP
It doesn't run anymore.

flybynite

The grounding system on a TGP is pretty good but I have found by adding a ground (4-8 gauge)wire from the engine to the body than a ground from the battery to the body will help with all kinds of stuff.A few years ago my TGP had a different code stored in the ecm every week but by adding extra ground wires cured all that and now when I have a trouble code I know its for real and not a bad ground.Later..Adam
1989 TGP Pace Car
1990 TGP Red/Tan Leather

Prospeeder

How exactly do you add a ground to the battery cable? Same with the body one, i wanna see if it will solve my dimming problem somewhat. Im not much on experience with electrical stuff
1990 TGP Chipped RU-1390 K&N
2001 Audi S4 Stage 2
1999 VW Beetle
1997 BMW 740iL

flybynite

Quote from: Prospeeder on March 31, 2006, 02:11:25 PM
How exactly do you add a ground to the battery cable? Same with the body one, i wanna see if it will solve my dimming problem somewhat. Im not much on experience with electrical stuff
I started at the battery,on the negative side I added a 8 gauge wire and ran it to the chassis(sub frame).Then I went from the chassis(same spot) and added another 8 gauge wire and ran it to the engine block.Hope this helps...Later
1989 TGP Pace Car
1990 TGP Red/Tan Leather

Prospeeder

how exactly did you add it to the battery/cable tho? Do i just directly add it to the negitive terminal or what
1990 TGP Chipped RU-1390 K&N
2001 Audi S4 Stage 2
1999 VW Beetle
1997 BMW 740iL

z284pwr

Quote from: Prospeeder on March 31, 2006, 05:22:20 PM
how exactly did you add it to the battery/cable tho? Do i just directly add it to the negitive terminal or what

Yeah, its just making your own battery cables basically, we did it when we changed engines....Its not rocket science :icon_razz:

GangstGP

Quote from: flybynite on March 31, 2006, 03:19:51 PM
Quote from: Prospeeder on March 31, 2006, 02:11:25 PM
How exactly do you add a ground to the battery cable? Same with the body one, i wanna see if it will solve my dimming problem somewhat. Im not much on experience with electrical stuff
I started at the battery,on the negative side I added a 8 gauge wire and ran it to the chassis(sub frame).Then I went from the chassis(same spot) and added another 8 gauge wire and ran it to the engine block.Hope this helps...Later
Its close, but there is 2 studs actually on the block.one goes to the top of the subframe like you say. I did that one first with 8 gauge. then all that did was put more strain on the other one . the other one from the battery turned green from the inside out. that just pissed me off and I put a 2 gauge there.

but you need a 15mm socket to loosen the nut I think, and the other smaller grounds around there can be trimmed up as well and shrink sealed.
daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

Prospeeder

yea the block grounds 15 mm, i had to loosen it and move the cable out of the way to take off my vacuum modulator
1990 TGP Chipped RU-1390 K&N
2001 Audi S4 Stage 2
1999 VW Beetle
1997 BMW 740iL

GangstGP

#10
heres the stock wire compared to the 2 gauge
daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

R Dubya

not the alternator or grounds, its the stereo.  aftermarket deck doesn't make any sounds so time to replace it.  Oh well, it's probably time to upgrade from a tape deck to a modern compact disc!!  :laugh:
Ryan Warren
'89 TGP
It doesn't run anymore.

z284pwr

Quote from: R Dubya on April 23, 2006, 07:03:32 PM
not the alternator or grounds, its the stereo.  aftermarket deck doesn't make any sounds so time to replace it.  Oh well, it's probably time to upgrade from a tape deck to a modern compact disc!!  :laugh:

Make sure its atleast MP3 ;)

Oh and depending on budget, I would suggest an Flip-out screen DVD or something along those lines.  I'm an Alpine guy, so obviously I'll suggest them.   :icon_lol:

LukeZ34

I think it was a common problem for the TGP Cassette decks to develop an alternator whine over time. Ours did the same thing, and I know of many others who also had the same problems. The noise did not carry over to our Pioneer deck, and it utilizes the same stock ground that the cassette deck did.
Former owner of 2 TGP's..


2006 Pontiac Grand Prix GXP -41k, Transgo Shift kit, auxiliary trans cooler, DiabloLew Tuned.

1987 Suzuki Samurai JX Tintop - Weber DGV5E carb, 2" exhaust, Calmini Header, 162k

R Dubya

its mp3 wma, xm ready so I am excited.  I will probably hard wire in a the get up for an ipod when it goes it, so I can use my buddies and mine when I eventually get one.

hey at least it ran good, thats whats most important.
Ryan Warren
'89 TGP
It doesn't run anymore.