1996 Dodge Caravan 3.8 V6 ...the turn signal don't work. It used to work on some warm days. Sometimes I had to wiggle a little bit the relay and it works. Now, its just don't do anything. Fuses and the emergency flasher are okay.

Refer to wiring diagram. It may help.
1996 Dodge Caravan Wiring Diagrams ' PDF ' Dodge ' Headlamp (scribd.com)

05 Dodge Caravan No Start P0688 bad wire - YouTube

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www.youtube.com/watch?v=yshodC_crqo
Sep 22, 2012 - Uploaded by Brian Mann 2005 dodge caravan crank no start p0688 asd relay circuit ... butdoing the voltage drop on the back of the connector to the ipm to.... ECM PCM STARTER 2003 DODGE GRAND CARAVAN 3.3L V6 WONT START ... 1996, 97, 98 Dodge Caravan Starter install3.8L V6 - Duration: 8:39. by Gary O 4,364 views.

Simple fix took me five minutes:
1.Gain access to the fuse/relay box thingy under the drivers side dash. It has a black plastic cover and two big black plastic screws, which don't really require tools.
2. turn on ignition and engage turn signal that is not working.
3. There is a module (cube shaped relay thingy at the top right of fuse-relay panel) Move it around, pull out and back in to re-establish connection. If your signal starts up, then that is it.

check for fuses or relays

Blend doors are not working.

check the AC belt

check both fuse boxes,, One is under the dash inside the van, the other is under the hood,,

J, I am sending you some info to read but it appears that the most likely cause is the blower motor relay. Give the following notes a read and if you need some more help give me a buzz... Best of Luck..

1996 Chrysler Town & Country 3.3L, Vin R 1996 Dodge Grand Caravan ES 3.8L, Vin L 1996 Chrysler Town & Country LX 3.3L, Vin R 1996 Dodge Grand Caravan LE 3.8L, Vin L 1996 Dodge Caravan LE 3.8L, Vin L 1996 Dodge Grand Caravan SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Caravan Sport 3.3L 1996 Plymouth Grand Voyager SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Grand Caravan ES 3.3L, Vin R 1996 Plymouth Voyager Rallye 3.3L Customer Concern: Front blower does not work; no power to it. Fuse is OK. Tests/Procedures: 1. At the blower motor, there is a Dark Blue wire. This wire should have battery voltage whenever the key is in the "on" position. Power for the blower motor comes from the blower relay.

2. Access the front blower relay, it is located on the driver's side under the dash, near the junction block. There will be four wires going to it. The Dark Green wire should have battery voltage all the time. The Dark Blue wire is going to the motor. The Black/Orange wire should have battery voltage with the key in the "on" position. The Black wire should be grounded at all times. On this circuit, the relay is energized whenever the key is in the "on" position. Potential Causes: Front Blower Relay
Front Blower Relay Wiring
Heater Ventilation Air Conditioner (HVAC) Control Head
Tech Tips: The front blower relay is located under the dash, on the driver's side. It may be necessary to remove the junction block (fuse and relay box) in order to see it. Diagnostic Codes: None

on the turn signal check the fuse block in the passenger compartment, it will be a square relay on the right hand side, try to adjust the relay with the turn signal on,

The Buick Century uses separate relays for the hazard warning and turn signal functions. The turn signal relay is located on the accelerator pedal bracket, and the 4-way flasher relay is located on the convenience center near the left kick panel. Try switching these two relays with one another to see if your turn signals work instead of your 4-ways.