solder or crimp
If you want to be completely safe use a high quality heat shrink with internal heat activated adhesive/sealant and make sure you choose the correct diameter to suit your wire size.
I've been watching Mighty Car Mods on You Tube lately (check it out, fun show) and those guys are DIYers that like to solder, but their mechanic friend Turbo Yoda says to always crimp in cars (and the engine bay in particular). However, the crimps and tool he uses are better than the average DIYer.
As others have noted, there are two camps that will support either way to do it.
Last edited by VIP1; Aug 17, 2014 at 01:24 AM.







