1986 Toyota Pickup does not start, clicking noise & gau

Thanks for the feedback. I had the battery load tested at a local shop and it is good to go. I pulled the starter relay (90987-02004) and checked for continuity between terminals 1 and 2, and for no continuity between terminals 3 and 4. Then checked for continuity on the 3-pin relay (presuming it is the neutral start switch) and found continuity between terminals 1 and 2 and no continuity between 3 and 1. Tomorrow I will check the ignition switch, clutch switch then the starter solenoid. For kicks, I put a 12v test light in the 3-pin socket with the key on, the light was bright between terminals 1 and 2. The light pulsed between terminals 1 and 3; the frequency matched the clicking noise when the relay is installed. Could there be a short in this circuit? It appears to go to ECU

It turned out to be part of an after market alarm system that was shorting out or worked enough to prevent the truck from starting. After removing the system, it starts up just great. Thanks for your suggestions.

How did u find your problem my turck is doing the same thing

When I turned on the ignition to start, a clicking sound started. I traced the sound to a 3-pin neutral relay switch behind a panel just left of the drivers feet. (Read my previous messages about some details.) I left the key in the 'on' position and eventually the clicking stopped. With the key still in the on position, I was wiggling wires near the 3-pin relay and the clicking started again after wiggling one of the wires. This wire was spliced in via a spade connector to a harness. I traced this wire to the drivers door light switch. That seemed odd. So I traced the wire where it was spliced in at the spade connector through the harness under the dash, which led to a black box. This turned out to be the brains of the alarm system. I was told when I bought the truck the alarm system was deactivated- not totally true. I disconnected the wire at the spade connector I found earlier and the truck started. I disconnected every wire going out of that black box and pulled the alarm system. The truck has been starting fine ever since! Hope this helps, good luck!

O MINE IS A DIFFERENT PROBLEM. THE STARTER RELAY THAT IS UNDER THE HOOD ON THE PASSENGER SIDE MOUNTED ON THE WHEEL WELL. I AM GOING TO POST A PIC. IT JUST CLICKS ONCE WHEN I TURN THE KEY OVER. ITS NOT THE BATT, ALT OR THE STARTER IT MIGHT BE THAT THE RELAY IS JUST BAD, BUT A NEW ON IS $180 BUCKS AND I CANT FIND A USED ONE ANYWHERE, MOST PLACES DONT EVEN KNOW WHAT I AM TALKING ABOUT. DO U HAVE ANY IDEAS FOR ME.THE PART SAYS STARTER RELAY TOYOTA 283000-35010 12V ON IT.

What year truck and motor is this? Did you jump the starter solenoid to see if it will crank? Presume you cleaned all the battery and starter connections as well. You might try this link for more info on continuity testing your relay before you replace it. Presuming you have a 4-pin relay refer to the drawing on the relay. Using an ohmmeter, check for continuity between terminals 1 and 3, and for no continuity between terminals 2 and 4. Replace the relay if continuity is not as specified. I tried uploading a component test sheet but no luck.

http://autorepair.about.com/library/faqs/bl470h.htm

I ran that test u told me about, 1 and 3 terminal was bad. Found one at a junk yard for 10 bucks I put it on and it works like a charm. Thanks for all you help.

Sweet! Glad you got it running! Best of luck. BTW, did that link work I sent you?