When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Caveman,
Scroll up to Jason Yancy's photo of the sending unit mounted to the rear cylinder. His bike is most likely an 80 inch shovelhead. The sending unit would mount in a similar manner to your ironhead. Does your sending unit look like that one, or is it the ring terminal type?
It is a ring terminal type. The connector isn't large enough to fit a spark plug through, so I'm a bit lost since I haven't found a wiring diagram for it. My assumption was one post is 12v, the other ground, and the ring that came with it to a spark plug on the rear cylinder, but that is not the case?
also, i would preffer to have a setup like Jason Yancy, but the sending units I found on the Steward Warner site only went up to 320 degrees and my ironhead runs a bit hotter than that during the summer.
It is a ring terminal type. The connector isn't large enough to fit a spark plug through, so I'm a bit lost since I haven't found a wiring diagram for it. My assumption was one post is 12v, the other ground, and the ring that came with it to a spark plug on the rear cylinder, but that is not the case?
also, i would preffer to have a setup like Jason Yancy, but the sending units I found on the Steward Warner site only went up to 320 degrees and my ironhead runs a bit hotter than that during the summer.
Go to FLH's thread at the top and follow it down. Is your ring terminal like his or are you refrring to the one at the end of the black wire on your gauge?
If so that black wire is for the gauge light. Also you need the housing shown in his voltmeter photo to mount the gauge to the handlebars.
Go to FLH's thread at the top and follow it down. Is your ring terminal like his or are you refrring to the one at the end of the black wire on your gauge?
If so that black wire is for the gauge light. Also you need the housing shown in his voltmeter photo to mount the gauge to the handlebars.
no, i don't have the ring terminal like FLH's post. i will need to buy one. and okay, thank you for clearing that up for me about the black wire.
is the housing unit neccesary for the unit to work? I had planned on fabricating a mount somewhere on the left side under the gas tank.
You don't need to have the gauge mount like FLH's but if you fab a mount under the gas tank it somewhat defeats the purpose of the gauge. Up on the handlebars you can see what's going on temp wise going down the road, under the tank kind of hard to see while riding.
You don't need to have the gauge mount like FLH's but if you fab a mount under the gas tank it somewhat defeats the purpose of the gauge. Up on the handlebars you can see what's going on temp wise going down the road, under the tank kind of hard to see while riding.
I will need to look down while riding, yes, but that is okay with me. I mainly want it to diagnose a possible overheating issue, and to know the temps on hot days. Either way, I've got it mounted now but still don't have a wiring harness for it because I'm not sure which type goes with the gauge. I would just buy both and see which works but I'd rather get the right one and save some money. I made a short video that I will try to add to this post.
You most likely need sending unit part # 75005-77 (temp gauge with light). I have an NOS 75005-69 sending unit but it doesn't mention the light. Your gauge position is ok, I have an oil pressure gauge on my shovelhead in about the same place on the other side. You don't need to tap the hole in the cooling fin for the sending unit., it takes a jam nut ( part # 7692) which is thin and goes between the head fins and the sening unit screws into the nut.
I do not see the ring type sending unit in the 1971 to 1980 FX model parts catalog. They do show a wiring harness part # 75003-69 for a 71 to 78 FX and part # 75010-79 for a 79 up FX.
You most likely need sending unit part # 75005-77 (temp gauge with light). I have an NOS 75005-69 sending unit but it doesn't mention the light. Your gauge position is ok, I have an oil pressure gauge on my shovelhead in about the same place on the other side. You don't need to tap the hole in the cooling fin for the sending unit., it takes a jam nut ( part # 7692) which is thin and goes between the head fins and the sening unit screws into the nut.
I do not see the ring type sending unit in the 1971 to 1980 FX model parts catalog. They do show a wiring harness part # 75003-69 for a 71 to 78 FX and part # 75010-79 for a 79 up FX.
You are right. I came across a parts catalog last night and was able to confirm the part numbers I need to comeplete the gauge. Thank you for all your help. I was able to find a sending unit on Ebay, but the wiring harness I have not had any luck. It is part # 75003-69 CABLE ASSEMBLY and part # 75006-69 DISCONNECT CABLE. If anybody has one for sale please reach out to me via message or on here as I would like to buy it.
I will leave these here for anybody else who might need them. Cheers
Edit: I have just purchased this wire www.ebay.com/itm/143676657663 in lieu of the two part wiring harness. It is my belief that it will be able to get the job done. Will update if otherwise.
Last edited by CavemanLouis; Oct 10, 2020 at 05:31 PM.
I also have two of this same gauge that I need to find what kind of sensors they use.
I want to use them on my M274, But I'm having difficult in finding the proper sensors.
Help !!
[QUOTE=66Muleman;21547699]I also have two of this same gauge that I need to find what kind of sensors they use.
I want to use them on my M274, But I'm having difficult in finding the proper sensors.
Help !
