This is a continuation of my repairs of a 2007 Tuscany that suffered a front hit...I have most all of the repairs complete, just tying up some loose ends.
The roof mounted Hadley air horns don't do much. One horn sort of makes a weak noise, the other is silent. The solenoid is working, I have plenty of air.
I can hear one of the 1/4" polyflo lines leaking just above the A pillar, interestingly, that's the line that supplies the horn that sort of works. Also, that semi working horn has quite a bit of air blowing out of the rear cap. The silent horn has no outward indication of air leaks, no sounds at all, and yes, I verified that it is getting air.
So, after that long winded background description, here's my question:
How in the world do those rear caps come off? There are no screws visible, and careful prying on the composite(?) cap only produces palm sweat. I know there are diaphragm rebuild kits available, but how to disassemble? Here's a pic of the front and back of the business end of the horn (note that I've removed the actual trumpet cone)
Oh, and there are no model numbers or serial numbers visible, just a very faded manufacture date. (9-20-07)
I appreciate any meaningful advice, hopefully from one of you that have repaired these things before. I much prefer to repair these horns, but if that's not practical, I'll buy new ones and mount them under the hood. These horns actually produce a fair amount of wind noise.