Need gauge lights and HELP!, Replaced my speedo cable....now electrical problems ....UGH!!! Options

[second wind]

Hello again gang.....I replaced my speedometer cable and after closing up the job my dimmer switch would pin the temp and gas gauges to the right....some sort of snafu I guess....some wire or something loose. I did find a loose blue and black wire that looks like it belongs to one of the little lights in the speedo....I have no idea of how to re-attach the wire?? Then looking behind the tach for a loose wire I broke off another wire going to the one of the lights in the speedo....my hands are way too big for this kind of work.....now I guess I need some replacement lights unless I can repair the existing units....plus finding out why my dimmer switch is affecting the other gauges....sheesh....anyway please send me some kind advice and instructions on how not to go crazy....which may be too late at this point....speedo works nice though!!
Thank you very much,
gg