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#1
07-29-2009, 08:27 PM
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Any way to "Test" #004 545 07 32 ["N2/4 Warning Module"]
A.K.A. "Seat Belt ,Key in Ignition,Courtesy Lights on,when door opened, Buzzer/Relay"
Symptomology:The Mercedes ignores activation of Port Side Front Door Switch. (Poster will be much happier if problem is with wire from Door Switch to Relay! "HowEva" wire from Door Switch to Relay tests good for Continuity to Ground.) ['Would Evil PO' s Mechanic go to trouble of pulling cluster to disconnect the wire from door switch to Relay's number 7 terminal? (Assumption would be to eliminate Buzzer and/or "C" lights at night) ]
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'84 300SD sold 124.128 Last edited by compress ignite; 07-29-2009 at 09:04 PM. 
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#2
07-29-2009, 10:00 PM
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If you know the internal schematic (or can figure it out) then it would be simple (for someone "skilled in the art") to test it. Otherwise, not.
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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#3
07-29-2009, 10:21 PM
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Bermuda Triangle of Electrons
Yeah, Well...
I can only find find the relay in the schematic for Courtesy Lights and it only shows 2 of the 8 sockets (#5 and #7) (Twisting head around 90 degrees[so synaptic viewpoint changes]... I think the wire from the door switch to the Relay's #7 terminal should show more than ground continuity...Mayhaps ,I found the problem ? If so, I'm not happy...New relay is 90 bucks)
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'84 300SD sold 124.128
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#4
07-30-2009, 01:15 AM
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If it was me, and I had good reason to think the "relay" was bad, I would open it up and take a look.
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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#5
07-30-2009, 02:55 AM
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I will, before I buy a New One.
First plan of attack,is to switch Door Switch with Right-side one.
(Although,I know I've tested the Driver's Switch in the past) Then pull the dash and "See" if the wire to the Relay's #7 is still hooked up AND has continuity back to the Door Switch. Well,Finally! Section 54-2312 has the Wiring Schematic and Legend "Seat belt Warning Control Unit" O.K. now we're cooking... Terminal 5 (right front door switch) and terminal 7 (Left front door switch) are Grafted together into one lead inside the Relay's casing...Either front door Switch provides a Ground Signal to that area of the Relay. So,since the right front door switch activates the Relay...the left front must be disabled somehow.
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'84 300SD sold 124.128 Last edited by compress ignite; 07-30-2009 at 03:45 AM.
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