[s-cars] ECU Fuse - Bentley - Frayed Wiring

[Tom Green]

Manny,

Have you tried a fuse, 5 or 15A since repairing the frayed  
insulation?  It should only cost a fuse if the short hasn't been  
corrected.  Unfortunately, I am
looking at a paper edition of Bentley so I can't correlate diagram  
numbers with you.  I am on page X804/805 titled electronic box for  
100 (A6) all models
(USA and Canada) model year 1995, (S6 up to July 1995).

Black connector, fuse, MAF, G70

Brown connector, fuse, O2S, oxygen sensor heater, Z19, Z28

Red connector, fuse, injectors, N30, N31, N32, N33, N83, N84

Yellow connector, fuse, ignition coil, J192, N, N128, N158

For S6 from July 1995, wiring diagram pages X1068/1069 the brown  
connector is not used, and (S72)? is added to the red connector and  
(S103)? is added
to the yellow connector.

Yeah, I know, that's six injectors and more coil connectors than  
exist in one car.  That's where experience come in. :-)

Now, disregard all that, since the '96 diagrams for S6 from July '95  
on page X1098 (which I found from the index for diagram #95-21 on  
page X973) simply list:

Black connector, fuse (S75) for Solenoid Valves

Brown connector, Fuse (116) for injectors

Red connector, Fuse (102) for Motronic ECM

Yellow connector, Fuse (S115) for ignition coils

So, you can see the source of confusion.  My cars bridge the  
difference and are indeed different.  I believe the 5A fuse in the  
red connector protecting the
ECM is the important one not to use a larger fuse.  Oh yeah, I have  
15A  fuses in the yellow connector for both vehicles.  I haven't  
looked for where the MAF
signal is fused, if at all, but if I look at the '97 index it sends  
me back to page X1068/1069 with black connector for MAF fuse.   As  
long as this fuse doesn't
blow I don't plan to look further.  Anyway, this last list is what  
your configuration should be except for the MAF instead of solenoid  
valves?  which must be
a V6 item and it correlates with the fuse arrangement you found.

Tom
'95 S6
'95.5 S6 avant


On Mar 3, 2007, at 5:30 PM, Manny Sanchez  
<manuelsanchez at starpower.net> wrote:

> S-Heads,
>
> Frayed Insulation at Coil Wiring
> I took the coil pack off and found 2 wires with frayed insulation  
> near the junction where it enters the head.  I now have a love hate  
> relationship with electrical tape---again. Looks like these coils  
> were indeed replaced at some time, but the splices were done at  
> this junction point. It's funny becuse the reason I picked up this  
> spare was that we old coils were replaced in this same manner and I  
> wanted a set that weren't spliced at this point.  Nuts.
>
>
> ECU Fuses
> I looked at my fuses in the footwell again. What I see does not  
> seem to jibe with the Bentley.
>
> This is what I have, from left (closest to transmission tunnel) to  
> right
>
> Black Plastic Fuse Connector
> Wires: RED wire /  BLUE wire
> Fuse: 10 Amp
>
> Tan Plastic Fuse Connector
> Wires: BLUE  /  Black with Red stripe
> Fuse - 15A
>
> Red PLastic Fuse Connector
> Wires: RED / Black with White stripe
> Fuse: 5A
>
> Yellow Plastic Fuse Connector
> Wires: BLACK  / Green and Purple Stripe
> Fuse-15A
>
> OK, so for me it was the Yellow Connector fuse that blew, and the  
> engine immediately died the other night.
>
> Looking at the Electronic Bentley on P24-27, Diagram 24-544 I see  
> something very similar to what I have except that Bentley only  
> shows 3 plastic fuse connectors and I seem to have 4.
>
> Bentley shows the following:
>
> Black Holder
> Evaporative Emissions Evap frequency valve circuit breaker (S-75)
> Unless I am looking at the wrong thing, which certainly is  
> possible, I have a fuse, not one of those silver circuit breaker  
> things.
>
> Brown Holder (Mine looks Tan to me, but I gues tan and brown are  
> close enough?)
> Injector Valve Circuit  (S-72)
>
> Yellow Holder
> Heated Oxygen Sensor (S-73)
>
> So the Bentley does not seem to have my Red Holder.
>
> A few questions
> 1. Have I been sniffing the modeling glue again and I am looking in  
> the completely wrong place?
> 2. Presuming my Yellow Holder and the Yellow holder in the Bentley  
> are indeed the same, this means that if that fuse blows for the  
> Heated Oxygen Sensor it will stall the engine--yes?
> 3. WHere should I looke for faults in the Heated Oxygen Sensor? I  
> replaced the o2 sensor about a year or 2 ago with the expensive OEM  
> part, no splicey dicey.
> 4. Does a 15A fuse for a heated 02 sensor circuit sound kosher to  
> you guys?
> 5. Is the Brown Holder 5A fuse I have what some of you guys who  
> responded that a 15A fuse was way too much thinking of?
>
> I must admit, wiring diagrams give me a slight headache.
>
> Although I have been driving around with a 15A fuse in the yellow  
> holder for years now, you 5A guys have me paranoid now, so the car  
> is sitting under the tree for now.
>
> Thanks for any help.
>
> -Manny
> 95.5 UrS6 Avant
>