Oct 29, 2018 · If the scan tool does not receive data from an OBD II vehicle. TEST 1: Connect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary. Do not connect to the body or chassis ground but to the battery terminal directly. With the ignition on, the voltage drop across the ground .... Sep 18, 2014 · 35 Posts. Discussion Starter · #1 · Sep 18, 2014. Only show this user. I recently sold my 1998 forester and got a 1999 in near perfect condition.. issue is on my way home from picking it up the CEL came on. I went to get it read, and my obd2 port wont connect to the code reader. I hear it could be a cigarette lighter fuse, haven't checked it yet..