I've been trolling the forums for a bit just looking up stuff when I have a problem on my 1992 Chaparral 1800SL with the 4.3 Mercruiser. In general, the site has been invaluable and I really appreciate all the informative posts. I joined today because after troubleshooting and reading for hours, I'm stuck. The boat sat for a 1.5 years because I'm in the National Guard and I was gone for a while. I've spent the past two weeks cleaning it up and doing maintenance. Well, it cranked fine and ran great. So, that was a great sign. The trim wouldn't go down so I searched the forums, tried some different things and finally got it working. Two days ago I decided to swap out the fuel gauge. The gauges on the boat are the older kind with the "prongs" you slide the wires onto, and the new gauges are the ones with nuts. So, I cut the old connections and added the new ones to the ground, ignition, and sender. I hooked up the ignition and send incorrectly the first time and all the other gauges quit working along with my fuel pump. It doesn't start humming when I turn over the ignition like it used to. I wired up the fuel gauge correctly and it works now but the other gauges and fuel pump are still MIA. I replaced all my fuses, cleaned my battery wires and replaced the terminals but still nothing. I hooked up the old gauge my redoing everything and now it works(doh!) I just can't understand why that one works and the rest don't. Sorry for the long post. Any help would be greatly appreciated!