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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: Wili74 on November 05, 2016, 03:59:50 pm

Title: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: Wili74 on November 05, 2016, 03:59:50 pm

My '74 C10 has a flexible printed circuit with two broken lines, one for my High Beam dashboard light and one to my Amp Meter. I've been told I can't solder jumper wires or the plastic backing will melt. Anybody found a good fix for the problem instead of replacing the circuit panel ($70+)?

Also, anybody found a cheap source for LED dash lightbulbs (replacements for the 168's)? A friend found a small supply for a buck each, but he got all of them.

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: hatzie on November 05, 2016, 04:16:19 pm

If you don't just have to have the Ammeter and mechanical oil pressure gauge you could install a 77-86 gauge panel after you re-pin the instrument panel plug for less than $70.
The 81-86 panel will have the larger tan fonts 77-80 will have the smaller fonts similar to your original gauges but with the blue KMH ring on the speedometer.

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: Irish_Alley on November 06, 2016, 07:21:20 am

you should be able to use http://www.ebay.com/itm/like/282000254935?lpid=82&chn=ps&ul_noapp=true

just make sure to clean the copper good.

if you do change dash clusters us this
http://forum.73-87chevytrucks.com/smforum/index.php?topic=31456.0

to make sure the pin layout is good 

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: hatzie on November 06, 2016, 07:45:06 am

Quote from: Irish_Alley on November 06, 2016, 07:21:20 am

you should be able to use http://www.ebay.com/itm/like/282000254935?lpid=82&chn=ps&ul_noapp=true

just make sure to clean the copper good.

if you do change dash clusters us this
http://forum.73-87chevytrucks.com/smforum/index.php?topic=31456.0

to make sure the pin layout is good 

Will that flow out on the plastic or just bead up?

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: Irish_Alley on November 06, 2016, 09:24:50 am

personally ive never used it. there has been others on here that said it has worked for them.
https://www.permatex.com/print-instructions/?prId=4093
the instructions will want to print but just cancle the print job

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: d.garcia on November 06, 2016, 01:20:21 pm

You can solder onto the cover strip and some of the plastic will melt but, that's ok. Once you are done cover the exposed cover strip with liquid tape which is designed to insulate electrical connections. I also did a instrument swap too. Here is the videos: https://youtu.be/W_QwTIP7CYc

Title: Re: 1974 Dash Printed Circuit - broken line, and LED dash Lights
Post by: blazer74 on November 06, 2016, 11:32:07 pm

I've also HEARD it works.