Chevrolet Repair: No brake lights, brake light switch, trailer connection

Question
Thanks Van for the quick response, Yes there is a trailer connection package on this thing, it was installed about three years ago suppose I should check there also and didn't see a second brake switch at the pedal could there be one under the hood somewhere? Any ideas on why truck would speed up when brake is applied to disengage the cruise? May have to take to shop, ugh $$$$$$$$$
Thans again, Rick-------------------------
Followup To
Question -
I have a 1994 3/4 ton 4x4 extended cab chevy Pu, with no brake lights. Have replaced brake light switch, all the bulbs and fuse, no go! Turn signals work, hazards work, tail lights work, but no brake lights or center cab light! Could it be in the wiring? When I encountered this problem, found when I had cruise control on and stepped on brake the darn thing sped up instead of releasing cruise control, Any ideas. Thanks in advance for your help.
Rick


Answer -
Hi Rick,
No cure here, but a couple thoughts.
Look and see if there are two switches on the brake pedal.
And I am curious if there is a trailer electric connector on that truck, or a trailer connected.

Van

Answer
Hi Rick,
I have some manuals here, but I seem to be missing your truck.
My full grown truck manual, latest I have is 1991, and it didn't have the high mount stop light. 91 stoplights used the same bulbs for stop and turn, as well as emergency flashers.

Looking in a later model book, but for the S10 pickups, they have a separate wire for the high mount stop light, which also supplies a connection directly to the cruise control module to disengage it.
If the cruise control module happened to have a bad ground connection, I could see a remote possibility of a feedback situation that might adversly affect the cruise, but I haven't run across it. I have seen where the cruise wouldn't work at all due to the high mount bulbs being burned out in a car, but that also illuminated the antilock brake light in the dash.

All of the brake lights work through the turn signal switch, which is closely wired with the cruise control switch, and a short in that area could cause problems, but to stop all the brake light functions without blowing a fuse would be kinda slim in my opinion.

I don't know if that truck has relays for the stoplights, but seems like a 95 I have at work has some relays under the hood. I just haven't needed to track down any problem among them, so can't really say.

Van