Re: Re[2]: Radio Questions

[Porsray@aol.com]

Kirby, did a little checking in the Bentley manual and you're correct.  Rear
window heater is also used for AM/FM aerial (front aerial is solely FM).

if you have access to rear amplifier, manual sez to check following:

1) Switch on radio, check for 12V power at powr supply connector (is at 
opposite end of amplifier from antenna lead going to radio)

2) if OK, check for current from power connector to amplifier.  should
be 30 - 50 ma; if not, replace the amplifier.

3) Remove heated rear window power supply (next to aerial wire connector).
Check for 12v powr from connector to ground (ignition ON & heated window
ON).

4) If OK, measure current draw between window power connector & antenna
amplifier.  Should be 13.0 - 13.5 A, then got to step (6).
If not, look for break in wiring or broken heater wire element and go to (5)

5) Disconnect lower window heater connector (upper one is for antenna).  With
window heater energized, should have 12 V at connector exiting amplifier.  If
not, check for wiring break; if OK, replace amplifier.

6) With above heater connector disconnected, connect ampmeter from 
heater connector to window connector, turn on ignition & window heater.
Should get 12V.

Good luck!

Ray calvo(porsray@aol.com)
1990 Coupe Quattro
1995 Porsche 993

In a message dated 96-09-09 19:17:10 EDT, you write:

<< Subj:	Re[2]: Radio Questions
 Date:	96-09-09 19:17:10 EDT
 From:	KSMITH1@mailgw.sanders.lockheed.com
 To:	Porsray@aol.com
 
 Ray:
 
 Thank you for your response and helpful directions.  I haven't yet 
 obtained the code, so the level of work I can do may be limited to 
 visiting my nearest dealer.
 
 This car doesn't have a proper aerial.  Wires in the front and rear 
 windows are used.  The am (and supplementary fm) is taken from the 
 back; I think from the heater element or a separate wire, the info is 
 not with me.
 
 ***                 ...Kirby    (Kirby A. Smith)                 ***
 ***              ksmith1@mailgw.sanders.lockheed.com             ***
 ***              [=]    kirby.smith@lmco.com                     ***
 ***  Opinions expressed herein are entirely those of the author. ***
  >>