I can't get my AM/FM radio to work cept at idle... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**tkeduk8r** · 06-04-2008, 11:06 PM

soooo thinking it could be voltage regulator, I checked the charging voltage at the battery and WHOLLY SMOKES 16.4 volts. (no wonder my lights have been so bright)... so I replaced the voltage regulator with a good spare I had laying around and I STILL have the same result... 16.4 volts and my radio still wont work... so I pulled my radio and tested it on my test bench and It works as long as the voltage doesnt exceed 13.6 volts.... sooooo.... next I took my voltage at the fuse block and sure enough 16.4 volts...

Anyone else have this issue???? I have seen and read plenty about not having enough charging voltage, but nothing about too much.... any ideas????
--Mike

caminokid · 06-05-2008, 07:13 AM

I had an 85 Dodge truck that one night I went out to start it and when I turned on the lights it was like flash bulbs going off. The radio started smoking...tail lights went real bright and then blew...dash lights went crazy...but the truck was running. Weird thing was I had 11.64 at the battery. Didnt go any further into checking what was going on. I just decided to junk that troublesome truck.

**tkeduk8r** · 06-05-2008, 12:52 PM

This one I cant junk... its my bb 72 Super

... just wierd why I would get 16 volts at the battery and fuse box with two different v-regulators... im just afraid Ill hurt the tach or some of the other electrical componenets with that kind of voltage....any body else have any experience????
--Mike

powell72 · 06-05-2008, 05:19 PM

Could it be the battery? Do you have another to try?

berencam · 06-05-2008, 06:34 PM

i had voltage issues so i changed out the voltage regulator with the high dollar one, and i still had issues. so i took it back and got the cheeper one and wala no problems with voltage.

06-04-2008, 11:06 PM	#1
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	I can't get my AM/FM radio to work cept at idle... soooo thinking it could be voltage regulator, I checked the charging voltage at the battery and WHOLLY SMOKES 16.4 volts. (no wonder my lights have been so bright)... so I replaced the voltage regulator with a good spare I had laying around and I STILL have the same result... 16.4 volts and my radio still wont work... so I pulled my radio and tested it on my test bench and It works as long as the voltage doesnt exceed 13.6 volts.... sooooo.... next I took my voltage at the fuse block and sure enough 16.4 volts... Anyone else have this issue???? I have seen and read plenty about not having enough charging voltage, but nothing about too much.... any ideas???? --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

06-05-2008, 07:13 AM	#2
caminokid Chevy nut Join Date: Jun 2007 Location: Springfield, Illinois Posts: 2,266	Re: I can't get my AM/FM radio to work cept at idle... I had an 85 Dodge truck that one night I went out to start it and when I turned on the lights it was like flash bulbs going off. The radio started smoking...tail lights went real bright and then blew...dash lights went crazy...but the truck was running. Weird thing was I had 11.64 at the battery. Didnt go any further into checking what was going on. I just decided to junk that troublesome truck. __________________ 84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!"

06-05-2008, 12:52 PM	#3
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: I can't get my AM/FM radio to work cept at idle... This one I cant junk... its my bb 72 Super ... just wierd why I would get 16 volts at the battery and fuse box with two different v-regulators... im just afraid Ill hurt the tach or some of the other electrical componenets with that kind of voltage....any body else have any experience???? --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

06-05-2008, 05:19 PM	#4
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: I can't get my AM/FM radio to work cept at idle... Could it be the battery? Do you have another to try? __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

06-05-2008, 06:34 PM	#5
berencam Registered User Join Date: Aug 2007 Location: branson mo Posts: 933	Re: I can't get my AM/FM radio to work cept at idle... i had voltage issues so i changed out the voltage regulator with the high dollar one, and i still had issues. so i took it back and got the cheeper one and wala no problems with voltage. __________________ 69 chevy c10 350 3 speed manual wood bed build thread here r.i.p. 70 c10 auto 350 build here

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