ILIKECARS53 Posted September 27, 2022 Share Posted September 27, 2022 Does anyone know where I get a better wiring diagram than what is in the shop manual. Need to do some wiring on a 1952 Chevy Bel Air with automatic transmission, but the shop manual does not have the neutral safety switch wiring nor does it have the wiring for the defroster/heater, fuse panel and radio. Any help would be appreciated. Thanks Jim Link to comment Share on other sites More sharing options...
TerryB Posted September 27, 2022 Share Posted September 27, 2022 The MoTors manual people made a book of wiring diagrams, this one on eBay might help. https://www.ebay.com/itm/194997925560?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=ahGuUSgDQB2&sssrc=2349624&ssuid=&var=&widget_ver=artemis&media=COPY Link to comment Share on other sites More sharing options...
F&J Posted September 27, 2022 Share Posted September 27, 2022 21 minutes ago, TerryB said: The MoTors manual people made a book of wiring diagrams, this one on eBay might help. https://www.ebay.com/itm/194997925560?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=ahGuUSgDQB2&sssrc=2349624&ssuid=&var=&widget_ver=artemis&media=COPY I have that book and it does not show what he needs, except the 50 and 51 diagram does show the neutral safety switch. Those show the start wire comes from start switch going though the 2 terminal NSS then going to the starter. 1 Link to comment Share on other sites More sharing options...
Oldsfan Posted September 27, 2022 Share Posted September 27, 2022 Heater/defroster, fuse panel and radio wiring will most likely be found in the accessory installation manual. 1 Link to comment Share on other sites More sharing options...
rocketraider Posted September 27, 2022 Share Posted September 27, 2022 Looks like all of these components are add-ons except you'd think a wiring chart would show a fuse block. Possibly there's a shop manual supplement volume that includes it? Was Chevrolet's 1952 body manual separate or incorporated into the chassis manual? Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted September 28, 2022 Author Share Posted September 28, 2022 Thanks for all your suggestions. I should be able to trace all the wires, but the diagram would have been helpful. Thanks again Jim Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted October 10, 2022 Author Share Posted October 10, 2022 Everything is going ok. Traced all the wires etc. In the past on other cars that I have done wiring I have used a wiring diagram for the gauge and color. But on the Chevy since I can't locate a diagram for some of the systems, I have been stripping the existing wires to determine the gauge. And now my question. Is 12 gauge wire today slightly smaller than 12 gauge wire from 70 years ago? It is not just 12 gauge but all the gauges. I noticed that when I strip a piece of replacement wire from Rhode Island wire the casing comes off nice and neat with no cutting into the copper. But when I do the same on the original wire, the stripper cuts into the copper. Just slightly but it is noticeable. I then tried putting an end on the two different era wires. The end will fit a little more snuggly on the older wire than on the modern replacement. I would not think that the gauge of a wire has changed but maybe it has. Thanks Jim Link to comment Share on other sites More sharing options...
bradsan Posted October 12, 2022 Share Posted October 12, 2022 A bit late but here is a link to the start of the relevant portion of the accessories manual . Wiring gets addressed if you keep clicking to the next page! Lots of detail on how the entire system was to be installed. http://chevy.oldcarmanualproject.com/accessories/1951am/51aim27.htm This is a great website, I keep waiting for it to fall into neglect when something happens to its owner. Brad Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted October 12, 2022 Author Share Posted October 12, 2022 (edited) Brad, This is great, really helps out. Thanks Jim Edited October 12, 2022 by ILIKECARS53 (see edit history) Link to comment Share on other sites More sharing options...
bradsan Posted October 12, 2022 Share Posted October 12, 2022 I have the heater in my 52 wagon and didn't realise, until you asked the question, that it was an accessory. Did the Deluxes and Belairs come with these factory equipped ? Or were these were done by dealers given the separate directions and lack of discussion in the shop manual? I'm trying to imagine the poor schmuck at the dealership that had to install one of these every couple of days! Link to comment Share on other sites More sharing options...
Oldtech Posted October 12, 2022 Share Posted October 12, 2022 I'm sure that In Canadian built cars the heaters would have been standard. I expect they would have been a factory option, not a dealer install. 1 Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted October 15, 2022 Author Share Posted October 15, 2022 Tomorrow I am going to recheck all the wire and wire ends needed and hopefully place the order on Monday with Rhode Island Wire. Thanks for everyone's help. Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted October 22, 2022 Author Share Posted October 22, 2022 Waiting for the order from Rhode Island Wire for the wire and most of the wire terminals. The flag spade ends were not available, so I had to order from Brillman. Received those yesterday. Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 4, 2022 Author Share Posted November 4, 2022 Started on the wiring for the Chevy. Laid out the template for the main harness. To the left is the front lights and to the right is under the dash. All wiring is run and taped. All dash wiring in place and taped. More to follow. Thanks Jim Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 4, 2022 Author Share Posted November 4, 2022 The main harness all covered. Going to test fit and then start on the starting harness. 2 Link to comment Share on other sites More sharing options...
rocketraider Posted November 5, 2022 Share Posted November 5, 2022 Easier to 👍 the whole series of pictures. Looking forward to more!😎 Link to comment Share on other sites More sharing options...
bradsan Posted November 5, 2022 Share Posted November 5, 2022 Is that wiring just for the heater or is it for the entire dash? Looking good either way .Not sure if you are concerned about the appearance of the 'shiny' tape ( at least that is how in looks in the photos) but a final wrap with black 'hockey' tape will give it a period look. Might be called athletic tape south of the border. Link to comment Share on other sites More sharing options...
Frank DuVal Posted November 5, 2022 Share Posted November 5, 2022 Is that electrical tape or the special harness tape that has no sticky? Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 5, 2022 Author Share Posted November 5, 2022 11 hours ago, bradsan said: Is that wiring just for the heater or is it for the entire dash? Looking good either way .Not sure if you are concerned about the appearance of the 'shiny' tape ( at least that is how in looks in the photos) but a final wrap with black 'hockey' tape will give it a period look. Might be called athletic tape south of the border. That is all the under the dash wiring. The heater is an accessory for 1952, so it is a separate harness. The wrap is a little shinier than I wanted, but close to the original that I uncovered under the dash that was not affected by heat and sunlight. The original wrap that was in the engine bay was a lot duller and very brittle. Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 5, 2022 Author Share Posted November 5, 2022 10 hours ago, Frank DuVal said: Is that electrical tape or the special harness tape that has no sticky? It is a non sticky wrap tape. Closest I could find. Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 5, 2022 Author Share Posted November 5, 2022 Started on the starting harness. This includes the neutral safety switch starter button and coil wire. This is a separate harness because the car is an automatic. If it was standard shift, would all be part of the main harness. Template for the starting harness. Starting to lay up wire for the starting harness. That black wire is 8 gauge. A little difficult to work with, does not stay put, needed to clamp it down. Harness wrapped with the same tape as the main harness. The part that is not wrapped is in the engine bay. It is from the neutral safety switch on the steering column, thru the fire and to the starter button. I wrapped this part, but it should have had the braided loom. This is far from a show car so that was not important to me. Thanks for all the interest. Jim 2 Link to comment Share on other sites More sharing options...
Frank DuVal Posted November 6, 2022 Share Posted November 6, 2022 Great work!👍 Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted November 9, 2022 Author Share Posted November 9, 2022 Quick update. Needed to order some grommets etc, to protect the new wiring thru the firewall and radiator support. Also decided to clean up the engine bay a little. Thanks Jim 1 Link to comment Share on other sites More sharing options...
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