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So some of the time (I would say 80-90%) when I try to start my truck it just clicks. This happend about a year ago and i took off the starter connector that faces the passengers side and sand the terminal down put some terminal cleaner on it and it worked beautiful for 4 months started right up all the time. However the problem is back. Here are my questions

1) Considering my starter is bad will the dealer install new contacts or it is it a do it yourself job?

2) I have a BL and there is a group of wires (assuming their ground wires) that was disconnecting from the frame on the drivers side could this have anything to do with it

3) Could it be the alternator or battery?

My battery is a 4 mo. optima and sometimes it does sound like my starter stays engaged with the engine running and eventually goes off either by itself or by turning off the engine

Any advice would be greatly apperiated
 

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is it jsut one click then nothing, like if your battery is dead.
or is it like a clickclickclickclickclickclickclickclickclickclickclickclickclickclickclick. that was happening to me even if i took the key out. it ran after a few trys but my starter motor was bad, so i had to get a whole new one (at 70,000? not like a toyota). if it is sticking like mine was you should fix it soon cuz you can break a few teeth off the flywheel

it isnt your battery not after 4 months, unless you leave your radio on every time you turn off the truck

hope this helps
 

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Try replacing the starter contacts. That usually solves these types of problems. You should be able to get them from your local dealer, if not try trdparts4u.com.
I pasted a right-up on replacing the contacts.
Tim

Starter contacts

Starter contacts are repairable all Toyota starters. They are the only part that normally wears out and are available, for most models from the Toyota dealers parts department. Some older models are not available but if you look in the phone book under auto electrical repair they will have what you need.
The following came from a great page for 4X4 owners.

You'll have to remove the starter from the vehicle.
Once you have it off you need to take the end cover off the solenoid, its best to use a 8mm wrench or socket. Once the cover is off you can take out the plunger and spring.
You can then see inside the solenoid to the contacts. Its the wear on these combined with the burned surface on the plunger that is causing those clicks when you go to start the engine.
If you look closely you will see on the old one there is an area worn away on the flat surface that contacts the plunger. Its this extra distance that the plunger need to travel that caused the intermittent connection and the clicks.
Clean up the plunger as shown.
You need to take off the contacts from the large bolts on the starter case and "tap off the old contacts" from the bolts. You install the new contacts the same way. You will see that there are some insulators protecting bolts from the metal case. Its important not to forget to reinstall these the way they came off.
When finishing the insulation of the contacts make sure that they are sitting flat in the starter. If they are not, (and in tightening the lock bolts they can twist) the starter will click again after a couple of days.
The kit that needs to be replaced are the positive side and the negative side. Toyota sells them separately. The positive side part number starts with 28226-16130 (this is an example for a JPP Corolla 92-97). The negative side would be 28226-74070 (for the same vehicle). Not all are the same, but with this example the parts dept. (if they did not know of this kit) will have a place to start.
 

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I just had a ground issue with my truck that wasn't allowing it to start, you should definatly make sure you have everything grounded well as a first place to start.
 
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