Dash cluster lights interacting with fuel gauge

[bunkclimber]

so I have a 84 Chevy K-30 Chevy with a standard dash cluster, I had a few dash cluster bulbs burned out so when I add the dash gauge lamps (twist-in from rear) then the fuel gauge flutters with the turn signal switch activated, but only R side..tried reseating the harness connector where it plugs into the cluster,made sure the PC film fingers were seated properly when I did that..didnt know if anyone else had this problem? would a w/gauges cluster interfere with a no gauges wiring harness truck? I thought the only difference is the cluster itself?

 

[Jgonick]

would a w/gauges cluster interfere with a no gauges wiring harness truck?

They are slightly different. see attachments

wiring diagram LINK - download 84 (page 10)

 

[bunkclimber]

yeah thanks,I pulled and reseated the pc film-cluster to harness connector..Im guessing I have the wrong PC film in my cluster as I replaced it.