Questions & Answers
Questions: I have a 1946 CJ2A. After a brake application, the brake lights stay on. So, I've replace the brake light switch (637417) a couple times which didn't fix the problem. I then just recently replaced the master cylinder and I have the same issue. If I crack one of the 4 bleeders on any wheel, the brake lights go off. Any idea's?
Question By: Tony Boelman on Aug 25 2021 11:09 PM
A bit odd. I would check your free pedal travel on your brake pedal.
Answer By: Willys Jeep Parts Tech on Aug 26 2021 5:27 AM
Questions: Does this part 637417 have the same thread dimensions as 647801 for CJ2A?
Question By: Joe Locatelli on Jan 10 2021 1:26 AM
Yes, that is correct.
Answer By: Willys Jeep Parts Tech on Jan 11 2021 5:37 AM
Questions: I need a brake switch for my M715, this looks like the one I need. Will it fit my 1968 M715?
Question By: Stephen on Jul 15 2018 8:35 PM
I have not tried this on a M715 before.
Answer By: Willys Jeep Parts Tech on Jul 16 2018 6:01 AM
Questions: My 1948 CJ-2A has this style brake switch with the male ends. Will this fit in a CJ-2A or only MB's and GPW's?
Question By: Ryan on May 29 2017 4:25 PM
That is more MB/GPW style typically. The 48 CJ-2A would have female ends.
Answer By: Willys Jeep Parts Tech on May 30 2017 5:35 AM
Questions: Is there a female end that clips on to the switch pins? The detents make it look like something slips over the pins to make the connection to the wires. My CJ-2a had no wiring to the brake light switch when I got it, so I want to wire it correctly.
Question By: Zach L. on Jan 2 2017 5:14 PM
The male connector is a NAPA item and can be heat sleeved in. We also offer complete wiring harnesses too.
Answer By: Willys Jeep Parts Tech on Jan 2 2017 9:18 AM
Questions: I just pulled my (looks to be an original sigle stage) brake master cylinder out of my 45 MB will the old brake light switch fit the new dual master I have purchased (waiting for delievery) and if so how do I bend test the switch. I have it out but a multimeter on it push a small flat stick into the hole on the other end push in but no meter change pooks like a bad switch to (brake lights did not work prior to pulling master)
Question By: Bob Huebner on Aug 12 2016 1:12 PM
You will need to reuse your old outlet bolt part number: 637605 Also check out our diagram section on brakes/master cylinder for your vehicle and it will help too. Its just a pressure switch.
Answer By: Willys Jeep Parts Tech on Aug 12 2016 7:35 AM