Brake light switch

[Mbenson1]

I could get another new brake switch, however I’m certain that will not resolve my issue. All of this started to happen after I replaced my hydro boost unit. So it probably has to do with the hydro boost part that I installed, or an issue with me installing the brake switch. It seems like there is only one way to install the switch, so I’m not sure what to check next. When the switch doesn’t work, it won’t allow me to shift out of park, so I have to jiggle it around until it’ll let me.

 

[Mbenson1]

Replaced with a new brake switch, still no brake lights and i am not able to shift out of park when the switch is clipped into the push rods. Any ideas??

 

[Erik the Awful]

Do you have power to one side of the brake switch? It should be there, key on or key off. If not, the problem is before the brake switch. If so, the problem is after.

 

[Orpedcrow]

Did you try holding brake in and moving wire a bit?

Do you have power to one side of the brake switch?

X3 need to verify consistent power at the switch.
There’s lots of sharp parts of the dash mounts under there, it’s entirely possible a wire got nicked or pulled while wrestling with everything during your hydroboost installation.

 

[Mbenson1]

I verified the wiring and connections are good. I can manually activate the switch by pushing it against the brake pedal pin. It almost seems as if the brake pedal is not able to press on the switch hard enough to activate it.

 

[2drXmobb]

Have you checked fuses, relays and bulbs ? Was the switch bad before ? Maybe a bad switch from the manufacturer try putting the old one back.

 

[Junior760]

Got a 98 GMC Sierra. I changed the brake booster. Installed a new brake light switch and rear lights won’t come on when I press the brake. I can manually move the light switch forward and the brake lights work. Any ideas in how I can fix this. Thanks

 

[Junior760]

i figured it out. After installing a new brake booster lights didn’t work. Went to the junk yard got a booster installed it and lights work now. It think it has to do something with push rod either the length or the size of it. Maybe the new ones are different but this worked for me. Hope this helps. Thanks

 

[GoToGuy]

Ok, what does the booster have do with it. It would be something to do with pushrod. Whether hydro or vacuum.

 

[SierraGT94]

i figured it out. After installing a new brake booster lights didn’t work. Went to the junk yard got a booster installed it and lights work now. It think it has to do something with push rod either the length or the size of it. Maybe the new ones are different but this worked for me. Hope this helps. Thanks

I don't have to change my booster, but I am still have the same issue as you did. I can hold the "new" switch forward and the lights work. But in normal operation the switch will not engage. The push rod is not bent either. I'm struggling with this simple issue lol can anyone help me out with this one??