Help me solve my cranking issue, what is this noise?

[magnumdust]

I'm at the point of my rewire where i can start my car and drive it. Or should be able to do so. However, when i go to turn the kick, if i'm lucky i'll get half a crank and then this buzzing noise.

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click to listen

 

[67Dart273]

Without knowing "your wiring."...........................

Where is the battery? front? trunk? Is the main battery ground to the block?

Are you sure the battery is OK? Is it charged up?

Cable connections?

Get things immediately down to the absolute most simple terms...............

The engine, the battery and the starter

Main cables should be hooked to the block and the starter, or to the relay stud and then a big at least no4 jumper down to the starter.

Jumper the starter with a clip lead/ start switch/ screwdriver.

When you do this, make some tests

1--Take your meter and hook one lead to the block.

STAB one lead into the battery positive post, jumper the starter. Meter should read more than 10V, the higher the better when starter is jumpered

2--If OK, move the meter lead to the battery cable clamp, repeat

3--If (2) is above 10V, move the meter lead to the starter stud. Repeat.

Somewhere in these 3 you should get a low voltage reading.

CHECK THE GROUND:

1--Clip one meter lead to the block, set meter for low DC volts, and stab positive lead into the top of the NEGATIVE battery post, jumper starter.

You are hoping for a very low reading, the lower the better. More than .3V (3 tenths of one volt) means you have a problem.

If the reading above is more than 3 tenths, repeat with meter probe stabbed into the NEG battery clamp. If this is low, and (1) above was high, you have a bad connection right there in the clamp to battery post.

If this reading is still high, you have a bad ground connection

 

[TrailBeast]

In other words, the battery voltage is to low to start your car.
That sound is classic low battery.
Put a charger on it and I'll bet it cranks fine.

 

[Bad Sport]

That sound is classic low battery.

Oh boy, I've heard that a time or two over the last 40 years, lol.

It also could be you are loosing you connection somewhere. Check, clean all connections. Power and grounds.

 

[TrailBeast]

Oh boy, I've heard that a time or two over the last 40 years, lol.
QUOTE]

Right?

It is possible that it's a connection, but I don't think so because he said it will crank about half a revolution and then does it. :glasses7:

 

[magnumdust]

I suppose everyone spends days trying to figure out a simple problem at one point.

In some free time today I started checking grounds/connections with no real luck. I had the battery cables on to where they were loose enough to be wiggled off, but still have good tension on the post.

While bashing my brain over this problem, I bumped the pos cable and noticed a spark. Yanked the cable and somehow there was a black substance on the terminal. No clue where it could've come from. A quick sanding to that terminal to remove the substance and it fired right up.

Battery isn't dead, the pos. cable was connecting well enough. Go figure.

 

[67Dart273]

......Yup......