Oil Pressure Switch Questions

Information and questions on GL1100 Goldwings (1980-1983)
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Posts: 6
Joined: Tue Apr 04, 2017 2:54 pm
Location: Wichita, KS, USA
Motorcycle: 1983 HONDA GL1100 Interstate

Oil Pressure Switch Questions

Post by ewhadley81 » Thu Aug 08, 2019 12:50 am

Hello all,

It’s EZ again, back in search of guidance and input. I am currently rebuilding my 1983 Interstate, and I broke the oil pressure switch hookup – the rubber boot that snaps onto the top of the pressure switch. It's the black rubber piece on top of the crankcase, right side. (still somewhat attached)

Repeat, my pressure switch is good. The rubber boot (with connecting wire) is broken. I am adding some pictures to this post, that way you guys can visualize which piece I’m talking about.

My questions are this:
Has anyone had this problem before? If so, how did you resolve this issue?
Has anyone here ever broken this rubber boot and spliced in a different rubber end?

I have found a few websites that list SUB-WIRE HARNESS D 32104-MB9-780 as containing the connector I’m talking about (see pictures), but none of those websites have that sub-harness for sale.

Therefore, I am thinking about splicing in a new end – if I can find one, of course. I only need the one end piece, but I will buy the entire sub-harness – if someone has one they would sell.

I am also planning to replace all old parts & pieces on the bike, including the oil pressure switch. Why all the options for oil pressure switches? (see last picture -- #13) Which one is correct for a 1983 GW GL1100 Interstate? It's kinda odd that there are so many options...

Thanks in advance, guys.


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Location: Denver, CO
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1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Oil Pressure Switch Questions

Post by DenverWinger » Thu Aug 08, 2019 6:04 am

Why are you replacing your oil pressure switch? Are you just replacing it because it is old? They very rarely fail....

The rubber boot may be hard to find, you can get by fine without it or just use it as is (I'm assuming the rubber split)... If you are concerned about moisture you could "paint" the connection with clear fingernail polish after you've attached the wire to the screw terminal.

Not sure on the multiple part numbers, any one of them should work fine...
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:


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Location: Milford NH summer and fall Oceanside, CA winters(N San Diego) with lots of miles riden between
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

1976 CB750 K6 Anterris Red 25,000 miles

Past rides
1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Oil Pressure Switch Questions

Post by newday777 » Sat Aug 10, 2019 5:43 am

Yes the rubber boot is probably not available. It is there for looks. My 75 CB750 never came with a boot on the oil pressure switch so it isn't necessary.
Yes just crimp on a new connector end if necessary.
I put some heat shrink on that wire on my 83.

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