big volts

BillGrissom said

Find where the 5 V drop from ALT stud to BATT+ occurs. Should be <0.5 V. First, measure across the battery post, i.e. from post to cable clamp. Corrosion there is common and needs a yearly cleaning in MO. If across the bulkhead connector (2 terminals: in & out), then your bulkhead will soon melt since P=(5V)*(40A) = 200 W = hot! That is also common.

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my mistake. yesterday, I jotted down the readings from the meter correct but when I listed it here, I should have wrote difference between the alt output post and batt + as .5 or .6 V. I just tested again, it read .2 volts difference but the engine didn't run all that long. I did check the batt + post to the end of cable , the same reading / ...... I checked at firewall bulkhead, running, 12.3 and 12.4, with just key on 12.1 and 12.3

I think I got the decimal on here now!! LOL

what did the engineer say as he watched the bridge fall? damn the decimal point??