hey so this past moth my 98 blazer with only 140,000 miles has been acting strange. 1. battery acts as if its dying i touch the positive end with finger and it cranks. 2. occasional stops at stop sign or red light it acts like a manual would if being choked down (its an automatic) 3. my turn signal relay continues to ding but turn signals are not engaged they work as they should just does not stop dinging replaced relay and it got worse so re installed original. 4. bypassed heater core and flushed it re connected and heat began working again but i lost a/c (worked before hand) not important at this moment just weird im sure there is more but cant think at this moment any info on these issues would be great thanks!!!

 

There is a good possibility a problem with the BCM. (Body Control Module). A capable scan tool could help verify .

 

thanks for reply but which issue would this address or is it a general for all?

 

COMPLETELY check both the pos n neg terms for a poor contact...@ BOTH ENDS...also do the same w/the wires @ the alternator....another "try" but no guar, is to remove ALL the elec harness plugs from the BCM, and clean BOTH the plugs and the BCM receptacles w/elec contact cleaner...also while disconn'd, check the plugs for loose wires, pins, etc...AND ALSO the BCM body where it is sealed w/screws/bolts... I've seen where heads of these seal bolt/screws have rotted, allowing moisture to get into the circuit board area...even seen where the head LOOKED like it was there, but had sever'd from the rest of the screw/bolt, creating a non-seal.....good luck