So just recently the "Cig" fuse has started blowing under Hard or sudden breaking

It kills the clock and radio, very annoying.

Im thinking that the sudden deceleration causes something to shift and creates a short...

Anyone know of some suspect areas for me to look?

looks like I may have to take the dash out to find this

 

Luckily the dash comes apart in about 5 minutes

Let us know what you find, my only thought would be what you've already mentioned. If the brakes were causing it directly (rather then decel g-force), you would be able to simply stomp the brakes while stopped to have the same effect.

Those wires behind the dash can be a bit if a rats nest sometimes. I bet a crimp connection came loose.

 

The circuit on "cig" fuse is one commonly picked up by after-market stereo installers. If you have anything in the center stack, I'd look there first.

 

I have an alarm but it doesnt get power from that circuit...
Its something else... Now its more sensitive...will trip the fuse on bumps on the road

 

My '93 schematics show the radio on the "radio" fuse (not "Cig"). In fact, I only see the lighter, clock, gear indicator, and light reminder relay on that circuit.

Any chance you have some after-market wiring on that circuit?

 

Thanks for the help.
I just looked at my FSM last night.

the diagram for the 86 has the cigarette lighter, clock, and radio getting their acc power from the Cig fuse...

the 86 doesnt have a "radio" fuse... too old i guess!

 

I would try to recreate that scenario without driving it. Wiggle the fuse boxes and such, wire harnesses, and whatever else you can tinker with, without taking everything apart first. At least you might find it before unnecessary removal of parts.

if you have to start the truck, start it. Otherwise, turn the key on, and get to fooling around the fuse boxes and wire harnesses. I'd wiggle the hernesses under the dash real well. That could help you figure out if it IS the wiring behind the dash.

Just my thoughts. Was a professional audio/video/alarm installer for a long time. Still do it on the side. Oh and I personally would rather build my own circuits for new equipment than tap into an existing circuit. Rules out my responsibility when the aux sockets die, or when anything else goes wrong. My circuit cannot interfere with another circuit and that saves you time and money in the event someone has an electrical problem down the road.