[DeTomaso] One step forward, two steps back

Sun Sep 27 17:46:08 EDT 2015

Charlie, when my horns stopped working and I needed them for an upcoming conclurs where all factory stuff must work,  I  started tracing the wiring. It is a grounding circuit and I chased the horn ground clear back to the stalk where the button is.  I found that the stalk is hollow and the final ground is inside the stalk. There is a small lump under the black paint about halfway up the stalk where the wire is soldered by means of a drilled hole so a ground is established. I removed the paint from the lump and heated it up with a soldering iron while pushing on the wire inside the turn signal switch. When the solder reflowed, the wire once again became a ground & the button honked the horns. That was 30 yrs ago & they still work, Good luck.

Sunday,September 27, 2015 11:47 AMTo: detomaso at poca.comSubject: [DeTomaso] 

One stepforward, two steps backHi allAfter my 6100km road trip from Spain toSweden this summer, my car fellapart on the way home.Both door lockswere damaged during a theft attempt (along with 5 otherPanteras) inCopenhagen.My radiator started leaking just about as fast as I couldpour water intothe tank (but we got home without overheating, so I won'tcomplain)AS mentioned here, I found that one of my rims developed aserious crack.And last but not least, my horns stopped working.I wasall excited yesterday because I had changed one of the locks in thedoor and itworks well, and as an added bonus I changed the bulbs in thedoor so that theynow come on when you open the door. I had forgotten aboutthem, to behonest!Today I set about doing what I thought would be an easy task -changing thehorns. I bought a new Hella airhorn a few weeks ago. The swapitself wasfairly straightforward - remove the stock Fiamm compressor and Iactuallydecided to leave the stock horn bodies and just use the newHellacompressor. Before putting the panel back in the car I checked to makesureeverything worked properly, and with 12v to the compressor it blowsquiteloud, especially when you are holding them in your hands.Iinstalled the panel in the car, turned the key on and hit the horn button.andwas greeted by silence.My horn relay is new. The compressor works, asdemonstrated during thepre-installation test. What would people suggest Icheck to determine whatthe problem is? It could be the turn signal stalk, butthose are expensiveand I'd rather not just throw money at the problem beforebeing able todetermine exactly where the problem is. What's thetroubleshooting procedurenow?Thanks.Signed, ratherdiscouraged. Only 9 months until Le Mans Classic and at thisrate I'mwalking.._______________________________________________

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   Charlie, when my horns stopped working and I needed them for an
   upcoming conclurs where all factory stuff must work,  I  started
   tracing the wiring. It is a grounding circuit and I chased the horn
   ground clear back to the stalk where the button is.  I found that the
   stalk is hollow and the final ground is inside the stalk. There is a
   small lump under the black paint about halfway up the stalk where the
   wire is soldered by means of a drilled hole so a ground is established.
   I removed the paint from the lump and heated it up with a soldering
   iron while pushing on the wire inside the turn signal switch. When the
   solder reflowed, the wire once again became a ground & the button
   honked the horns. That was 30 yrs ago & they still work, Good luck.
   Sunday, September 27, 2015 11:47 AM To: [1]detomaso at poca.com Subject:
   [DeTomaso]
   One step forward, two steps back Hi all After my 6100km road trip from
   Spain to Sweden this summer, my car fell apart on the way home. Both
   door locks were damaged during a theft attempt (along with 5 other
   Panteras) in Copenhagen. My radiator started leaking just about as fast
   as I could pour water into the tank (but we got home without
   overheating, so I won't complain) AS mentioned here, I found that one
   of my rims developed a serious crack. And last but not least, my horns
   stopped working. I was all excited yesterday because I had changed one
   of the locks in the door and it works well, and as an added bonus I
   changed the bulbs in the door so that they now come on when you open
   the door. I had forgotten about them, to be honest! Today I set about
   doing what I thought would be an easy task - changing the horns. I
   bought a new Hella airhorn a few weeks ago. The swap itself was fairly
   straightforward - remove the stock Fiamm compressor and I actually
   decided to leave the stock horn bodies and just use the new Hella
   compressor. Before putting the panel back in the car I checked to make
   sure everything worked properly, and with 12v to the compressor it
   blows quite loud, especially when you are holding them in your hands. I
   installed the panel in the car, turned the key on and hit the horn
   button. and was greeted by silence. My horn relay is new. The
   compressor works, as demonstrated during the pre-installation test.
   What would people suggest I check to determine what the problem is? It
   could be the turn signal stalk, but those are expensive and I'd rather
   not just throw money at the problem before being able to determine
   exactly where the problem is. What's the troubleshooting procedure now?
   Thanks. Signed, rather discouraged. Only 9 months until Le Mans Classic
   and at this rate I'm walking..
   _______________________________________________
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References

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