Pontiac Repair: 97 grand prix electrical issues, left turn signal, dim flashes

Question
97 Grand Prix SE, started with A/C blower only runs on speed 5 now right headlight is dim - flashes with right turn signal. P-R-D-1-2 lights flash with left turn signal. Internet troubleshoot issue for A/C blower issue. So far,fixed leaking seal above blower motor (water ran inside car) ,replaced blower resistor (multiple times - run 1-5 for a day and then burns out resistor),replaced blower motor, replaced ignition switch harness, replaced blower 1-5 switch. 7 pin female plug to resistor has rust residew from water leak - next to be replaced.
 Been working on blower issue. Recently right headlight is dim and started to flash with right turn signal. Left turn signal flashes Drive gear indicator lights PRD12.
 What do all circuits have in common? I thought is was the ignition switch harness.

Answer
Hi Mike:
your on the right track. you have an issue with a power feed to the ignition switch most likely. high resiatnce between the underhood fuse block and the ignition switch.  the most likley spot is the pass thru from under the hood into the vat the rubber boot that protects the harness collects water and holds it in and one or more of the feeds are corroded. It's going to be a red heavy gauge wire that is where I would look first. good luck :)