ABS and TCL (traction Control) light on

Hello members,
Have had ABS / TCL light come intermittently for some time. I believe it to be a wheel sensor or ABS unit. Came across the following site / post where a member grounded OBD module to receive code (issue was REAR WHEEL SPEED SENSOR). Unfortunately, site is only for information and can no longer post;
GalantForum member drseabreeze;
http://www.galantforums.net/board/viewtopic.php?t=8594

He states he grounded PIN 1. Did he use jumper to ground PIN 1 to another PIN (PIN 1 and 4) or to chassis (2002 Mitsubishi Galant ES-V6)?

Image of OBD module
https://mail.google.com/mail/u/0/?ui...87c0&zw&atsh=1

Follow up, have confirmed that issue is defective front wheel speed sensor (MITSUBISHI MR370932). Has anyone removed / replace speed sensor? Interested in knowing what is involved replacing sensor.
Thank you in advanced for any additional information.