Extremely Fast Signal Light Flashes - changes speed upon braking?

[94Sierra4x4]

Drove the rig last night, blinkers seemed to change from an extremely fast to a somewhat normal speed when applying pressure to brakes, and when releasing brakes they would resume with the fast blink.
Then.. it switched around, normal speed until I applied the brakes, then it went extremely fast.

Bad ground? or maybe I funked somethin' up in the wiring when I cleaned it all up month ago.

 

[shelbyt.67]

Yeah, check grounds and sockets. Check trailer wiring. May just be a bad relay.

 

[94Sierra4x4]

Roger that - thanks fella, puttin' er in the shop ina few to see what's up.

Just realized my speedo wiring is snipped off at the transfer case, no wonder speedometer hasnt worked. Wheres the purple/green wires go
Gonna be chasing wires today I think lol.

 

[Devs93]

on the tailshaft you will see a round plastic peice the wires hook ok there that is your vss

check and make sure you dont have turn signal bulb out ground sockets etc like previuosly mentioned it may need a new flasher realy

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[94Sierra4x4]

Sorry Devs, I need to know where the wires come from to get to the VSS,
I'll check the turn signal bulbs - having a bulb burnt out will result in the fast flash?

 

[Devs93]

yes the bulbwill cause fast flash...to let you know you have an issue being a 94 pull you glove box you will see a whit box (dRAC Or vssbuffer) there will be 2 plugs going into that box iirc the vss wiring goes in the bigger plug. if you wanted to try and chase have fun lol but it drops down over the bellhousing when it goes under the truck

 

[sewlow]

having a bulb burnt out will result in the fast flash?

Yes!!

 

[94Sierra4x4]

Yikes - okay. Well i -think- the wires may be just tucked away all the wiring is taped up, i'll chase it back as far as i can reach from underneath.

Hopefully i see them

 

[94Sierra4x4]

Yes!!

Thanks I checked them all a month ago before the trans went back in, everything was working... WAS being key