03-12-2015, 09:48 AM
here's a cheap ready-made tester. cheaper still without the 13-pin adapters.
http://cgi.ebay.com/ebaymotors/7-13-Pin-...SwMmBV6rQB
http://cgi.ebay.com/ebaymotors/7-13-Pin-...SwMmBV6rQB
It goes, it stops (as reqd). 
Hate Housework!

Hate Housework!