Can i solder two battery cables together to make it longer?

SOURCE: changing positive post terminal battery cable

Cut off old terminal. Cut back insulation and check for discoloring or corrosion.

If corroded, clean with baking soda /water solution.

If discolored (burnt), cut back until you find shiny copper. If it's too far back, replace entire cable.

If not discoloring or corrosion, the cheapest solution is to go to any auto parts store or even auto section in wal mart and buy the type that uses two bolts to clamp down over new cable.

The BEST way would be to crimp a heavy duty terminal on there, and then shrink-wrap it to protect against the elements. However the tools could be expensive unless you can borrow.

SOURCE: Wiring harness or Battery Cable Harness?

I dont know if this will help but vI had the same problem with my farm tractor It turned out to be a short in one of the wires cant remember vwith one. try tracing them from the batery back

SOURCE: The positive battery terminal has corroded through

Yes, go to subaru dealer and buy org part. It will come with end and new wire attached. You will have to attach to starter. Not the easiest way to fix, but the best way. You can just cut off end and replace with a new one from autoparts store. Get battery cleaner and spray on battery and rinse off to get all corrosion off or you will have same problem again quickly.

SOURCE: car drags when trying to start. had battery

Clean positive cable! But take off neg. first to avoid arching. Put positive back on first then reconnect negative. Use a amp. draw meter to see if starter draw is not too high. You may need a new starter.

SOURCE: 2007 Mitsubishi Galant battery cables

clean all corrosion off, use baking soda and water and tooth brush, tighten then loosen fasteners slowly to remove use silicone lubricant,