Turn signals and reverse lights on 88 Jeep Wrangler not working. keeps blowing fuse and showing dead short @ Fuse Panel with Volt OHM Meter.All bulbs are good.

Horn also uses a relay . What year , make , model vehicle. The odds of the fuse being the falt are high , Fuse's do blow , but not for no reason . Short's to ground cause fuse's to blow . Which means electrical wiring problems or short's in electrical componets . Do you know what a relay is an how it works ?
VEHICLE RELAYS Operation Diagnosis
Do you know what electrical wiring diagrams are ? How to use to pin point areas in a electrical circuit ,to test with a DVOM - digital volt ohmmeter ?
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

Free wiring diagrams here http://www.bbbind.com/free-tsb look under electrical distribution - power distribution . fuse panel . will show fuse layout .

you have a short in one of the light sockets or a worn wire from the wiring harness. could be the flasher assembly. are the turn signals different bulbs from the brake lights? Does using the brakes blow the fuse? (Rear lights or brake light switch on brake pedal). left or right turn signal blowing the fuse will tell which side has the short. 4 ways only, replace the relay.

are the hazards dead too? on all 4 corners.?
all fuses in all fuse boxes.
and checked the with ohm meter, not just glance?
PDC fuse 9 good?
FB fuse 13 good.?

info center the speedo cluster is dead?
pdc 17 fues and FB 10 fuse run the cluster

see wiriing chapter here.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

its all there. use a simple volt meter to find cause.

The fuse #5 next to the flasher should be for the turn signals. Fuse number 1 is for the stop and hazard circuit. Everything goes thru the turn signal switch so the short could be in there. You would need to unplug the turn signal switch to check the circuits with an ohm meter.
The brake and signal circuits are separate until they get to the turn signal switch.
You can register for free at autozone's website and get access to basic repair info and wiring diagrams.

reverse is a whole different circuit. via the transmission reverse switch..
my guess is you have burned out lamps.
im looking at alldata.com now. (so can you)
and i will pick the Reverse page, its boy scout simple
battery, fuse 39, wires a switch and 2 lamps.

i bet fuse 39 is blow,
replace, it. some that look good, are in fact not (micro cracks)
or use an ohm meter (dmm set to ohm low)
0 ohms good
infinity bad.

there is a fuse box in engine bay and cab.

There is a shorted wire somewhere in that circuit. Check to see if any wires are pinched under a bracket or brace where he was working. I have seen it where it was a light bulb the was bad. Need someone familiar with a volt/ohm meter to help trace problem. Good Luck. You did not state where he had been working.

I assume you must have also checked the rear turn signal bulbs.
You may have to start using a volt meter. Check for 12 v at the bulbs also check the bulb ground...that's a common cause of light problems.

If the bulbs and the fuses are good, check the brake light switch. You might of shorted out the switch when working on the pig tail. Always use a test light or volt meter when installing pig tails. This way you can check for power and ground before hooking a wire up to help prevent shorts. But by what you have said it does sound as if the brake light switch is now bad.

you have a dead short somewere check bulbs for proper installation and check reverse switch on trany for abrasions on wires use ohm meter to find short!!!! :)

short in the wires will need a wiring diagram and ohm/volt meter to locate the problem, test lights work well to.
you will need replace the fuse with a light bulb so that the power will not go away. and you will have to search for power going straight to a ground source.
usually a raw wire from rubbing somewhere. can do a quick visual inspection first for the obvious, and then use the meter at certain points till you find a volt drop.