By the dimmer switch, are you talking about the pivot assembly that the turn signal lever mounts into, or the switch itself mounted down the steering column. If it's the pivot, it's a PITA job that requires a couple of specialized tools. If it's the actual switch, other than removing the hush panel under the dash and standing on your head, it's a simple locate, un-plug, unbolt, re-bolt, re-plug proceedure. The new dimmer switch may need to be adjusted once installed, which could require an assistant to operate the lever as you adjust it to get it right. The mount holes are slotted, and you move the dimmer up and down until it clicks as the lever is moved.