Yes I have fixed those on both my Fairlanes with replacement Monroe air adjustables and if you are towing it is certainly worth keeping this system. It sounds like the shocks have a leak in the rubber portion in the middle with the hole exposed when they unfold with a load on and pumped up.
Get a spray bottle and fill it with a strong detergent mix and spray on the shock around those rubber sleave bits while its under load and watch for bubbles. Also do a self test; flick the interior light switch (door switch on the A pillar near your feet) on and off thre times in one second and count the flashes (it will take a few minutes to pump up and then lower the supension before fashing the warning light). Post the results here to know what code you have.
I would bet London to a Brick its the right hand shockie leaking as a result of heat from a leak at some time in the muffler near the right rear wheel (the fix for this in to drill a 2 to 3mm hole in the lowest point of your new muffler then spray it with cold galvanising spray; this will stop the condensation collecting in your muffler each day and rusting it out - you'll be amazed at how much water comes out this hole each day after you drill it). Some mufflers come with this drain hole already in place but this is rare these days; they want you to buy new mufflers more regularly. If you do the hole in the muffler trick and replace the shocks with monroe air adjustables (which is what the originals are) the system will then last for years and years.