Back up light switch on Muncie SM 465 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CCCC · 09-27-2017, 12:25 AM

Am putting a 72 Longhorn drive line back together and today encountered a devilish little prob - the two-pronged connector that slips onto the reverse switch on the side of the trans simply will not go on. Although a bit beat up, it is a typical two prong connector - one horizontal tab and one vertical and the connector slips into the switch base. But not today.

I've tried the on-line parts houses for a new switch/connector - no luck so far. Will this be a dealer-only item? Hope not.

I'd even love to find a decent used connector pig-tail if anyone has a suggestion. There should be one on must old wiring harnesses. Thanks for any ideas.

saxart · 09-27-2017, 06:21 AM

Are you saying that everything is intact, but you can't force the connector itself onto the switch mounted into the transmission? If so, I had the same problem with mine (I think the plastic connector shrinks with age?) I was able to get mine on by taking a small, very fine file and just slightly chamfering the edge of the switch where the wire plugs on. I also put a little dab of grease on the inside of the connector housing. Doing these two things allowed the wire to be forced on.

CCCC · 09-27-2017, 01:22 PM

Thanks, saxart. I looked at that tight fit and thought about what you did, and I appreciate your knowledge/experience - good to know that someone else ran into the same prob. . That plug/socket had not been apart for 45 years and it simply does not want to go back together. Probably cooked a bit and plastic shrunk.

Visually, everything lines up and it looks like it should go, but I did not want to force too much and break something. I will be giving your fix a try.

Thanks again.

P.S. Does "saxart" convey a sax player?

saxart · 09-27-2017, 10:05 PM

Quote:

Originally Posted by CCCC

P.S. Does "saxart" convey a sax player?

CCCC · 09-28-2017, 01:02 AM

Well, your advice was good and, with considerable effort. I got the connector onto the switch. That location made it a challenge and it still seemed not quite tight, so I taped it for good measure. Thanks.

I like Selmers.

saxart · 09-28-2017, 05:12 PM

Glad it worked out CCCC!

09-27-2017, 12:25 AM	#1
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Back up light switch on Muncie SM 465 Am putting a 72 Longhorn drive line back together and today encountered a devilish little prob - the two-pronged connector that slips onto the reverse switch on the side of the trans simply will not go on. Although a bit beat up, it is a typical two prong connector - one horizontal tab and one vertical and the connector slips into the switch base. But not today. I've tried the on-line parts houses for a new switch/connector - no luck so far. Will this be a dealer-only item? Hope not. I'd even love to find a decent used connector pig-tail if anyone has a suggestion. There should be one on must old wiring harnesses. Thanks for any ideas. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp

09-27-2017, 06:21 AM	#2
saxart Registered User Join Date: Aug 2012 Location: St. Croix River Valley, WI Posts: 795	Re: Back up light switch on Muncie SM 465 Are you saying that everything is intact, but you can't force the connector itself onto the switch mounted into the transmission? If so, I had the same problem with mine (I think the plastic connector shrinks with age?) I was able to get mine on by taking a small, very fine file and just slightly chamfering the edge of the switch where the wire plugs on. I also put a little dab of grease on the inside of the connector housing. Doing these two things allowed the wire to be forced on. __________________ Meet "Old Roy": http://67-72chevytrucks.com/vboard/s...d.php?t=707801

09-27-2017, 01:22 PM	#3
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Re: Back up light switch on Muncie SM 465 Thanks, saxart. I looked at that tight fit and thought about what you did, and I appreciate your knowledge/experience - good to know that someone else ran into the same prob. . That plug/socket had not been apart for 45 years and it simply does not want to go back together. Probably cooked a bit and plastic shrunk. Visually, everything lines up and it looks like it should go, but I did not want to force too much and break something. I will be giving your fix a try. Thanks again. P.S. Does "saxart" convey a sax player? __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp

09-28-2017, 01:02 AM	#5
CCCC Registered User Join Date: Mar 2007 Location: San Pedro River, SE Arizona Posts: 734	Re: Back up light switch on Muncie SM 465 Well, your advice was good and, with considerable effort. I got the connector onto the switch. That location made it a challenge and it still seemed not quite tight, so I taped it for good measure. Thanks. I like Selmers. __________________ CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp Last edited by CCCC; 09-28-2017 at 12:46 PM.

09-28-2017, 05:12 PM	#6
saxart Registered User Join Date: Aug 2012 Location: St. Croix River Valley, WI Posts: 795	Re: Back up light switch on Muncie SM 465 Glad it worked out CCCC! __________________ Meet "Old Roy": http://67-72chevytrucks.com/vboard/s...d.php?t=707801



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