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post #1 of 7 (permalink) Old Apr 26th, 07, 07:13 AM Thread Starter
 
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NO START--horn very weak--even with new battery--Ideas????

I have no corrosion on batt. connections......

My '75 Camaro will not start- even with a jump or a new battery installed!!! I checked for any loose connection @ the starter (none noted). I get a very weak radio, horn ---even with a fully charged battery installed?!?!?! headlights look pretty normal....weird

Do you have any idea that could be causing this? There is light corrosion in the battery cable itself (positive side near battery and also on the back of the starter (on connections). Should I try and the clean the starter connection first??

Could it be the starter?
Thanks in Advance!!!!!!!!!!!!
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post #2 of 7 (permalink) Old Apr 26th, 07, 11:10 AM
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Re: NO START--horn very weak--even with new battery--Ideas????

Check your grounds too. Battery to block and block to frame.
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post #3 of 7 (permalink) Old Apr 26th, 07, 11:19 AM
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Re: NO START--horn very weak--even with new battery--Ideas????

Go to the horn relay and find two red wires screwed to a buss bar. Remove one wire and apply it to the other wire & screw them both into place with the one screw.

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post #4 of 7 (permalink) Old Apr 26th, 07, 07:26 PM
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Re: NO START--horn very weak--even with new battery--Ideas????

I would replace both battery cables right off the bat to illiminate them from the equation. I have had similar problems in the past and found that simply installing new "thicker" cables often solves many of them.

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post #5 of 7 (permalink) Old Apr 27th, 07, 02:51 AM
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Re: NO START--horn very weak--even with new battery--Ideas????

Quote:
Originally Posted by go2fast View Post
Check your grounds too. Battery to block and block to frame.
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post #6 of 7 (permalink) Old Apr 27th, 07, 07:06 PM
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Re: NO START--horn very weak--even with new battery--Ideas????

I usually like to use the voltage drop method to find out where the juice is going. Use a digital volt meter to read the voltage. First off, during crank, the battery should stay above 8 volts -- preferrably 10 volts.

Then measure between the battery+ post and starter. Should see less than 0.1 volts drop. Then measure between the battery- post and the engine block. Again, should see less than 0.1 volt. Somewhere the voltage is being lost to a high resistance (actually relatively low resistance in a starter circuit). But the end result is that the voltage drop will be hot, and may melt stuff and burn the heck out of your fingers when you touch it.

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post #7 of 7 (permalink) Old Apr 30th, 07, 06:31 AM Thread Starter
 
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Re: NO START--horn very weak--even with new battery--Ideas????

cHAnged the battery cables----That was IT!!!! starts fine now!!!!!!
Thanks for all U guys HELP!!!!
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