I am looking for a printed circuit for a 1977 f150. I am find ones that are red and green. What is the difference? The one I took off of the truck is red and damaged. Any help?

 

There are at least a half a dozen different printed circuts between 1973-1979.

You need to replace the printed circut you have with the EXACT same number as the one that came with your truck. The others with different numbers are not compatible.

The difference between the circuts are, Gauges/Idiot Lamps, and or circut design changes between the years to add, Fasten Belt lamps, Economy lamps etc.... Why matching the number on the circut is very important.

 

Thank you. I have two different numbers on mine 7f48G and D6TF10c956 or do I need to match both sets?

 

Just the D6TF10c956, number is needed.

Be aware that there might be a prefix Letter at the end of that number. Like D6TF-10C956-A or D6TF-10C956-B as loose examples. Those prefixs need to match exactly as well. If your circut doesn't have a prefix like the above examples, don't replace it with one that does.

 

Thanks again. This one does not have a prefix. LMC has a printed circuit for 76-78 what are the odds it will be the right one? I have looked on ebay and the only one available doesn't have oil or alt gauges just lights. I tore this one when I was taking it apart and now I can't find a replacement. Am I in trouble?

 

No, you are not in serious trouble. They are avaliable aftermarket.

For 1976-1978, you have a 50-50 chance to get the right one, unless it's listed for the following....

EDIT:

Blue Oval has the Circuts as well, and they are a Forum Sponsor...


With Idiot Lights

http://www.blueovaltruckparts.com/i-...nd-gauges.aspx


Or

With Gauges

http://www.blueovaltruckparts.com/i-...th-gauges.aspx



EDIT: EDIT:

Also make sure the White "Plastic looking" composite cluster back isn't crumbling due to Cluster Rot. If so, you will need a new one of those too.

 

Yeah that completely disintegrated when I took it out. The ones I found on ebay were the entire unit, new gauges, white composite cluster, and circuit. Thanks. I'll check out the websites you listed.

 

You can use the plastic Cluster backing out of 1981-1991 Econoline Vans as well, if it's got gauges.

In 1981 the clusters were made out of different material that does not rot like the old composite ones did.

You just need the Printed circut for your 1977 and to swap your gauges and speedometer to the new backing.

 

It can be much simpler. As long as your gauge package meets the wiring harness in the dash - i.e. the cluster (complete assembly) comes from the same option package - then just change an entire unit and be done with it.

The odometer can be dealt with in your maintenance log.

I've never bothered trying to change the printed circuit portion.

If your truck came with ammeter and oil pressure gauges, find the nicest looking unit you can that came from a truck with same options, and swap it in.

I've done this where I've gotten trucks with MPH instead of KMH, or in one case I liked the coloring of the background panels / border more than what was in it and then .. swapped away.

I know this wont please purists, but I'm not in that league at this point.

 

Are you still needing one of these clusters? I've got one that I'm parting with...

 

I ordered a guage cluster from ebay from an 89 e-van, with guages not idiot lights. I was told that I would have to swap out the printed circuits, but I plugged it in as is just to see what would happen, worked great. Not really sure why, and would like to know why it ended up working. Although, the gas guage isnt accurate (reads lower than it actually is) and the temp guage SOMETIMES reads very cool, but never goes above the middle section of normal. I think (or hope) those two problems are either the IVR or sending units and not due to the fact I didn't swap circuits.

 

It depends on what year the truck and the van is.

If the printed circut number matches the old one, they are a direct swap.

If the numbers dont match, you should swap them as they are different for some reason.