[rick bell]

i have had problem with gear and avonics togeather, it is usally associated with low voltage. weak batteries will cause the gear not to function properly and make the radios work sporadically.
usally it is a combination of things, very weak battery, and after starting it is really drained, so radios start going wacko with transit voltages. the gear take most of the amperage however the weak or bad battery will consumue most of the voltage before the gear hyd. packs gets it's. as the gear cycles torward the end of the cycle that is where the highest amperage is. if you change celnoids, change all four, they are ages and proned to stick (cheap less tha 30 ea). i have many time had the a/c jacked and the gear operate fine; however it is usally connected to an outside power source as not to drain the battery, so if you jack it try it without an outside power source (you can always recharge the battery and your condition will be more realistic to flight conditions, especially if you put pressure on the gear as it retracts and extends). also the squat switch have a tendency to act unpredicatable before they fail. so soometime it will give signal that the a/c is still on the ground during it's cycling (which will confuse you with the different indications, doors open but the gear doesn't retract or extend or the opposite) you can check the squat by going in the nose gear well and follow the wire to the terminal strip, jumper across the leads and cycle the gear, if it works the squat is bad and cessena will send you a new one for 180 for a 15 switch.