Aftermarket radio loses memory presets - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Savidio44 · 01-21-2019, 02:11 PM

Did a small search and didn't find anything applicable. '71 Cheyenne with aftermarket radio that was in the truck when I bought it some time ago. Works fine good sound for a half deaf guy...........Memory function for station presets used to work now every time I start the truck I have to reset the memory. Are there backup batteries in these things or what? A little help please!

rockyrivermark · 01-21-2019, 02:54 PM

one of the power wires (often yellow) needs to be constant power for clock and preset memory
See if inline fuse is blown and check for power
Small light tester is a big help for checking electrical problems.
Like this

https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds

Husker · 01-21-2019, 03:12 PM

Could be Orange wire also.
Ron

kazoocruiser · 01-21-2019, 03:16 PM

Agree with above. Check your lighter fuse, or wherever radio taps into power supply. Memory presets / clock need constant power.

Switched power is a separate lead, to power radio amplifier.

rockyrivermark · 01-21-2019, 03:19 PM

This also may help

Andy4639 · 01-21-2019, 06:32 PM

Sounds like to me your radio is going out on you if it worked before and now it doesn't. You did check fuses I'm sure before asking for help so that's a no brainer but some old radio's have a mini fuse on the backside of the unit it'self that may have blown.

*randy500* · 01-21-2019, 06:45 PM

Quote:

Originally Posted by rockyrivermark

This also may help

Thank you for posting that, I have never thought of those categorized like that before....

rockyrivermark · 01-21-2019, 08:01 PM

Quote:

Originally Posted by randy500

Thank you for posting that, I have never thought of those categorized like that before....

I think a board member made it.
I saw it years ago here and saved the image.
Good to have.
Mark

72GreenMonster · 01-21-2019, 10:16 PM

If your battery is near the end and does maintain a certain voltage you will also lose your preset stations. Kept happening to my retro sound until I replaced the battery.

Problem solved. Still needs a constant battery source to keep memory

01-21-2019, 02:11 PM	#1
Savidio44 Registered User Join Date: Nov 2013 Location: Chapin South Carolina Posts: 66	Aftermarket radio loses memory presets Did a small search and didn't find anything applicable. '71 Cheyenne with aftermarket radio that was in the truck when I bought it some time ago. Works fine good sound for a half deaf guy...........Memory function for station presets used to work now every time I start the truck I have to reset the memory. Are there backup batteries in these things or what? A little help please!

01-21-2019, 02:54 PM	#2
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	Re: Aftermarket radio loses memory presets one of the power wires (often yellow) needs to be constant power for clock and preset memory See if inline fuse is blown and check for power Small light tester is a big help for checking electrical problems. Like this https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds __________________ My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com

01-21-2019, 03:12 PM	#3
Husker Registered User Join Date: Dec 1999 Location: Mid NE USA Posts: 2,212	Re: Aftermarket radio loses memory presets Could be Orange wire also. Ron __________________ Member #111 68 C-10 Daily Driver 70 4x4 Project 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson

01-21-2019, 03:16 PM	#4
kazoocruiser Registered User Join Date: Aug 2018 Location: Bronx, NY Posts: 215	Re: Aftermarket radio loses memory presets Agree with above. Check your lighter fuse, or wherever radio taps into power supply. Memory presets / clock need constant power. Switched power is a separate lead, to power radio amplifier.

01-21-2019, 03:19 PM	#5
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	Re: Aftermarket radio loses memory presets This also may help Attached Images __________________ My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com

01-21-2019, 06:32 PM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Aftermarket radio loses memory presets Sounds like to me your radio is going out on you if it worked before and now it doesn't. You did check fuses I'm sure before asking for help so that's a no brainer but some old radio's have a mini fuse on the backside of the unit it'self that may have blown. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

01-21-2019, 10:16 PM	#9
72GreenMonster Registered User Join Date: Dec 2018 Location: Los Angeles Posts: 53	Re: Aftermarket radio loses memory presets If your battery is near the end and does maintain a certain voltage you will also lose your preset stations. Kept happening to my retro sound until I replaced the battery. Problem solved. Still needs a constant battery source to keep memory __________________ 72 GMC Sierra 2500



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