Horn Switch Adapter

M38MN · Post by **M38MN** » Tue Sep 03, 2019 7:09 pm

Just bought my 1st Jeep [M38] and I'm trying to fix the horn. It is/was a dash push button but I want it back in the steering wheel. I removed the switch for multiple reasons. There was no hole for the rod [missing] but rather a seal of some sort and when I poked a 1/8" rod thru I got a bath of GO. The box has been rebuilt and all is tight in the front. How do I get the adapter out because I believe there is no tube thru the box? I don't want to undo the work that was done. Can I remove the side cover and drift it out after removing the box? TM 9-1804B did not address the adapter.

4x4M38 · Post by **4x4M38** » Tue Sep 03, 2019 7:34 pm

The adapter is pressed into the housing at the bottom.
I’m guessing (ducks!) a civvy repair/ replacement with a button on the dash, etc., may use an adapter that is plugged.

In any case, you may have to remove the box to remove and properly replace the adapter in the housing.

The commonly referred to civvy manual may have info.

Post by **wesk** » Wed Sep 04, 2019 2:03 am

Actually it appears none of the manuals offer any real help. There is a rather large choice of manuals by the way:

Ross Steering Gear Civvy Manual (in my photo album) No Help!
TM9-8615 Ross Strg Gear Military Manual No Help!
TM 9-1804B M38 Running gear (only mentions the adapter once in Insp)
SM1005 & SM1046 Willys factory manuals for CJ's do not use a bottom mount horn switch. No Help!

Oddly the M38A1 uses a different adapter RG PN 402141, WO# 806915 which TM 9-8015-2 M38A1 Running gear says is threaded. The comparison of part numbers between the M38A1 & the M38 will further skew the whole program.

M38 Parts List:
Adapter, Horn switch -- ORD# 7375150 WO# 801717 RG# 402130
Switch, Horn ----------- ORD# 7375088 WO# 800299 SRM# E8240A
Tube, oil seal ----------- ORD# 7375337 WO# 801186
Tube, oil seal w/adapter ORD# 7375342 WO# 801716 (this includes both Tube 7375337 & adapter 7375150)

M38A1 Parts List:
Adapter, Horn Switch---- ORD#________ WO# 806915 RG# 402141
Switch Horn ------------ ORD# 8329689 WO# 806412
Tube, Oil seal ------------ ORD#________ WO# 809078 RG# 078053-9 1/4
Tube oil seal w/adapter-- ORD# 7375337 WO# 801186 RG# 9470-9 (This includes Tube RG# 078053-9 1/4 & Plug RG# 402129)

Yep, this is very confusing and I made no typo's, these are straight from the two ORD 9's.

This image from TM 9-1804B confuses it a bit more:

G740 · Post by **G740** » Wed Sep 04, 2019 5:58 am

You can interchange the adapters. Yes, Wes is correct in that there were 2 different part numbers, but you can use the later designed adapter in either gear box. We manufacture the later type adapter and have them in stock.
Midwest Military, Inc.
John

4x4M38 · Post by **4x4M38** » Wed Sep 04, 2019 7:08 am

Hi John!
Thanks for the clarification.

Wes, wow. That last pic....I guess I need to go look at mine again.

M38MN · Post by **M38MN** » Wed Sep 04, 2019 11:29 am

Thank you all for the information. I'm going to try a pipe wrench to see if I can twist the adapter loose, if not then I'll be digging a hole to remove the assembly. And based on the picture from Wes I'll have to disassemble the box to get to the adapter if I need to drift it out from inside the box. Again, thank you all for the quick responses.

Post by **wesk** » Wed Sep 04, 2019 12:07 pm

Correct, if you can't pull or pry it out, you must disassemble the gear box, separate the tube from the plug and drive the plug out.

Have you at least removed the steering wheel and checked for existence of the original pushrod and mid-tube spacer?

Again those other manuals are:

Downloadable for free in our Downloads Page: http://www.willysmjeeps.com/v2/modules. ... it&lid=136

TM 9-8615 Ross Steering Gears 1953 Will be available soon on our downloads page.

Willys/Kaiser Factory CJ manual CJ2 thru early 5. You can download the Steering Chapter from my photo album: http://www.willysmjeeps.com/v2/modules. ... _album.php

Kaiser factory service manual for the later CJ's 1955 thru 71. I only have a couple of chapters loaded in my photo album.

Keep my photo album in mind when you roll your sleeves up, I have a great deal of technical illustrations and info there: http://www.willysmjeeps.com/v2/modules. ... _album.php

M38MN · Post by **M38MN** » Wed Sep 04, 2019 2:34 pm

Not as of yet. I just pulled the rubber button off and tried to get a 48" x 1/8" rod down the shaft trying to find the tube using a piece of leather cut into a 5/8" circle as a centering guide. I know the rod is missing and most likely the mid tube spacer once I see a picture of what that is. I will look at/download the Ross Manuals. I've downloaded most of the TMs.

M38MN · Post by **M38MN** » Wed Sep 11, 2019 12:15 pm

Task completed. Thank you all for the information.