The relay is making the clicking noise but not because it's defective. It's a normal response to low battery voltage. If jump-starting didn't help, suspect loose or dirty battery cable connections. You will never get enough current from the jump-starting vehicle alone to crank your engine. You need your battery too.
If the cable connections are the problem, you will also notice the dome lights and headlights go out when cranking the engine. Normally they will just dim a little.
The comment about the solenoid is correct, but it will cause a single clunk when trying to crank the engine, and it will be louder than what you're hearing now. The worn contacts are very common and can be replaced for 20 bucks, but most people just replace the entire starter.
Also measure the battery voltage. Normal is 12.6 volts with the engine not running. If you find around 10 - 10.5 volts, suspect a dead cell in the battery. Often a jump start can not overcome the defective battery.
Caradiodoc
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Tuesday, September 15th, 2009 AT 12:41 AM