Bizarre radio problems.

Lesabre T-type or other H-body related topics.

Moderators: MICHAEL MEYER, Xtreme/T-Type, custom88, Lo Type

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Bizarre radio problems.

Post by T » Wed Jul 13, 2005 12:30 am

My car is destroying radios. When I got my 88 it had a cheap aftermarket stereo in it, after about 6 months it started acting up so I replaced it with the factory one. After only a couple weeks it did the same thing. Thinking it was dumb luck I put in the one from my 87 temporarily and now it's doing the same thing.

Here are the symptoms. The first one started by losing the station and going to static. Then I noticed it would work for a while on one station, but not on others. The factory stereo had the same symptoms, like it was drifting from the proper frequency sometimes on to another one. Now my 87 stereo is doing the same thing, but I can get my first two presets fine(they are low numbers), but my second two(and higher) frequencys don't work. The really weird part is that on my way home I could manually dial in the second two presets, but when I pushed the button I'd lose them. Now the entire upper half of AM gets the same classical station, but at a progressively higher pitch the higher you tune it. :-?

The car also had an aftermarket antennae in the back window. I switched back to the factory one, but I have no clue if this is the cause.

Is it possible for the wiring in the car to cause a specific problem like this in multiple stereos?

thanks for any help,
-T

'87 Lesabre T-type
L67 swap, CAI, STB, 180deg stat, Walbro 307 fuel pump, tranny cooler, Michelin XGT H4s, ZZP 3.4 MPS, AC 41-601 plugs.
PB: 14.447@95.08 (2.299 60ft.)

'88 Lesabre T-type
RIP

For questions concerning Lesabret.com, please e-mail me at lesabret@gmail.com

88T-FL
2008 Site Supporter
Posts: 1449
Joined: Fri Jun 13, 2003 2:35 am
Location: Southern Florida
Contact:

Post by 88T-FL » Wed Jul 13, 2005 12:52 am

Sounds a bit like the antenna or the cable that runs from the trunk to the dash. Do you have a spare antenna that you could just hold on to and plug directly into the radio? That way you can eliminate antenna and cable.

That fails I'd check the at the radio voltage and the ground.

Starve these puppies of signal or power and they do strange things.

Thanks - Peter
88 BLT, 89 BLT, 89 BLT (Sold and missed), 86 LGN, 86LGN

Tbird
2008 Site Supporter
Posts: 994
Joined: Tue Jun 28, 2005 3:55 pm
car:: 87 Lesabre T-type
Location: Owen Sound area, Ontario, Canada

Post by Tbird » Wed Jul 13, 2005 2:37 am

As Peter stated I'd check with a totally different antenae and cable.
Otherwise you may be getting some kind of strange interference on your DC voltage into the radio. As Peter mentioned, check the DC volts at the radio connector and make sure it's not higher than 13.8 Vdc. If you have a digital multimeter, change it to AC volts on the lowest scale and check for AC ripple. If it is too high it may be the problem and a DC filter may fix the problem. Also if there is a big AC ripple what is creating it. Most likely the altenator.
tbird@live.ca
1987 BLT :mtt: with no rust, clean and 517k kms / 321k miles.
1987 BLT :stt: rust free from Florida and restored with 77 kms / 48k miles.
1988 BLT :stt: RIP. Spare parts car for the 87 BLT. Had 490k kms / 304k miles.

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Post by T » Wed Jul 13, 2005 3:19 pm

Well with the old antennae hooked up it didn't seem to drift, but the reception was poor. How can an antennae change the frequency of the stations?
-T

'87 Lesabre T-type
L67 swap, CAI, STB, 180deg stat, Walbro 307 fuel pump, tranny cooler, Michelin XGT H4s, ZZP 3.4 MPS, AC 41-601 plugs.
PB: 14.447@95.08 (2.299 60ft.)

'88 Lesabre T-type
RIP

For questions concerning Lesabret.com, please e-mail me at lesabret@gmail.com

Tbird
2008 Site Supporter
Posts: 994
Joined: Tue Jun 28, 2005 3:55 pm
car:: 87 Lesabre T-type
Location: Owen Sound area, Ontario, Canada

Post by Tbird » Wed Jul 13, 2005 3:54 pm

Strange stuff will happen if water enters the antennae. Also bad wiring can create issues. I've never heard of an issue like yours but you need to start somewhere for troubleshooting. Antennae and cable are the first things. Then voltages and AC interferences.
tbird@live.ca
1987 BLT :mtt: with no rust, clean and 517k kms / 321k miles.
1987 BLT :stt: rust free from Florida and restored with 77 kms / 48k miles.
1988 BLT :stt: RIP. Spare parts car for the 87 BLT. Had 490k kms / 304k miles.

CaliforniaT
2004 Site Supporter
2004 Site Supporter
Posts: 198
Joined: Fri May 21, 2004 5:23 pm

Post by CaliforniaT » Wed Jul 13, 2005 11:12 pm

Sounds like the magnetic sheilding is breaking down in the antena wire. There are a lot of magnetic fields in a car that can cause odd stuff like that. Something like what makes a computer monitor's image vibrate. I'm not sure if they would damage the radios though. Have you tried the radios in other cars? Good luck
'89 Red (mostly) Lesabre T-type. Strut brace otherwise bone stock.

luvgm
New Guy
Posts: 16
Joined: Fri Jun 17, 2005 6:55 am
Location: MN

Post by luvgm » Thu Jul 14, 2005 7:48 am

there also is different ways that each deck picks up the reception from surrounding areas. I just went down to the cities(the twins) this weekend and got great reception from the pioneer deck in my 88 lesabre, was still getting 93.7 down in owatona. My pickup on the other hand has a clarion deck in it and if you are not with in twenty miles of the station it loses the reception(figure that one out it is supposed to be better quality :x ), the deck acted the same way when I had it in my 70 nova. When I had the original stereo in the lesabre while I was hear in cass lake I would pick up stations from Duluth, that is 150 miles away. On the other hand the deck out of my 87 lesabre does not pick up those same stations. I would try to replace the antenna wire in the car if that does not work I do beleive that JC Whitney sells an inline antenna amplifier for cars.
Certified I-car technican (steering and suspension, air bag, paint, frame, body, etc.)Certified PPG paint technican
Certified Martain senor paint technican
1987 lesabre, 1988 lesabre, 1991 lesabre.1970 nova, 1989 k1500, 1982 280 zx 1994 GMC ext

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Post by T » Thu Jul 14, 2005 3:25 pm

I'll try a few things out this weekend. It's now working, but reception is strange and changes with the direction the car is pointed. What's the best route for testing the antannae and cable?
-T

'87 Lesabre T-type
L67 swap, CAI, STB, 180deg stat, Walbro 307 fuel pump, tranny cooler, Michelin XGT H4s, ZZP 3.4 MPS, AC 41-601 plugs.
PB: 14.447@95.08 (2.299 60ft.)

'88 Lesabre T-type
RIP

For questions concerning Lesabret.com, please e-mail me at lesabret@gmail.com

electra380
Advanced Member
Posts: 525
Joined: Wed Jun 23, 2004 1:22 am
Location: Virginia
Contact:

Post by electra380 » Thu Jul 14, 2005 7:31 pm

make sure the antenna hasnt like rubbed through the plastic and is touching the body of the car in its hole.

Just a thought

Oh and do you have power antenna? If you do, try unhooking that wire from the back of the radio..maybe some interferance there too
"Possibly a rare granny rack? you know them things give you all the extra power needed to outrun a cop car. they only put them on grandma's Buick because they know they wont abuse the power."

88T-FL
2008 Site Supporter
Posts: 1449
Joined: Fri Jun 13, 2003 2:35 am
Location: Southern Florida
Contact:

Post by 88T-FL » Thu Jul 14, 2005 10:37 pm

Hey T,
If you do not have a spare antenna to eliminate the car's antenna and long cable, how about a Torx screwdriver? :D (Swap the radio into your other T and see if the problem moves).

Thanks - Peter
88 BLT, 89 BLT, 89 BLT (Sold and missed), 86 LGN, 86LGN

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Post by T » Wed Jul 20, 2005 6:14 pm

Thanks for the suggestions guys. It apears I found the problem. I pull apart the connector behind the glove box and althought it looks fine, when it is partially connected the signal works properly, but when pushed together it goes out. My guess is that the two parts are touching.

Very wierd.
-T

'87 Lesabre T-type
L67 swap, CAI, STB, 180deg stat, Walbro 307 fuel pump, tranny cooler, Michelin XGT H4s, ZZP 3.4 MPS, AC 41-601 plugs.
PB: 14.447@95.08 (2.299 60ft.)

'88 Lesabre T-type
RIP

For questions concerning Lesabret.com, please e-mail me at lesabret@gmail.com

88T-FL
2008 Site Supporter
Posts: 1449
Joined: Fri Jun 13, 2003 2:35 am
Location: Southern Florida
Contact:

Post by 88T-FL » Thu Jul 21, 2005 1:01 am

Glad you found it and thanks for updating us. I'll remember this one.

Thanks - Peter
88 BLT, 89 BLT, 89 BLT (Sold and missed), 86 LGN, 86LGN

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Post by T » Wed Aug 10, 2005 11:49 pm

Well the issue is still there. Now with a different antennae cable and the factory antennae back in place. I'm not sure what to do now. Perhaps some kind of interference?

-T

prodigy_16
Advanced Member
Posts: 822
Joined: Sun Jun 23, 2002 1:00 am
Location: ky maroon 89' LeSabre t-type
Contact:

Post by prodigy_16 » Wed Aug 10, 2005 11:55 pm

sounds like your signal wire is being grounded somewhere.
FAST CARS ARE NOT CHEAP, CHEAP CARS ARE NOT FAST.

T
Administrator
Administrator
Posts: 3120
Joined: Sun Sep 23, 2001 1:00 am
car:: 87 Lesabre T-type
Location: MN
Contact:

Post by T » Thu Aug 11, 2005 3:16 am

I replaced the entire antenae wire, used parts though.
-T

'87 Lesabre T-type
L67 swap, CAI, STB, 180deg stat, Walbro 307 fuel pump, tranny cooler, Michelin XGT H4s, ZZP 3.4 MPS, AC 41-601 plugs.
PB: 14.447@95.08 (2.299 60ft.)

'88 Lesabre T-type
RIP

For questions concerning Lesabret.com, please e-mail me at lesabret@gmail.com

Post Reply