355 Footwell Fusebox Question | FerrariChat

355 Footwell Fusebox Question

Discussion in '348/355' started by vracer, Oct 13, 2015.

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  1. vracer

    vracer Formula 3

    Jun 23, 2014
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    Richard
    My car is a '96, and I'm referring to pages L21 & 23 in the OM.

    I had to pull a relay out of the footwell to check a circuit in the "main" left front fusebox. The relay I wanted was 332 015 013 which is shown in the 'L' position, but it was switched with 332 014 140 which is supposed to be in the 'M' position.

    After I checked my circuit I decided that someone in the past had probably switched the relays by mistake, and I should just put them back where they belong. The car started and ran fine to get gas for a weekend rally, and started a second time to come home to pack for the rally.

    The next morning, I pushed the fob button, got my beep, beep, the starter turned, but nothing. Luckily I had a German car in the back of the garage I could pull out for the rally.

    I purchased a spare 013 relay; I put that in the "wrong" place. I put the 140 relay in the "wrong" place, and the car starts and runs perfectly.

    This has been a long path to the question, but I'm asking for a couple of people to check in their footwells to see which relay is in which position. Is this relay reversal a common situation? Or have I been singled out for special treatment by the Italian Car Gods? ;)

    Thanks,
    Richard
     
  2. Enzojr

    Enzojr F1 World Champ

    Dec 12, 2013
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    Tomy
    Can you post a picture ?
    I am getting old and need one to reference ;)
     
  3. vracer

    vracer Formula 3

    Jun 23, 2014
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    Tomy, I have closely examined pics that were sent to me by another F-chatter, and it was next to impossible to determine which relay was which. If you want to see which set up you have, Owners Manual page L21 shows the relay positions, and page L23 shows which relay is supposed to go where.
     
  4. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell
    Is the 96 the early series or the late series F355? i.e. do you have the early series with relays "L to T" (i.e. 9 relays), or the late series with relays "L to R" (7 relays)?

    On the early series, "L" is the RH bank injector ECU relay (Shown as "E5" on the '94 wiring diagram and probably printed on the plastic of the relay panel). P/N 0 332 014 140 according to the early series owners manual.

    On the later series, "L" is the Injection Air Pump (E10 printed on the plastic of the relay panel). On my car, this a metal cased relay with P/N 0 332 015 013.

    On the early series, "M" is the RH Fuel Pump ("E6" on the '94 wiring diagram and probaby E6 printed on the plastic of the relay panel). The P/N is 0 0332 014 140 (owners manual)
    On the later series, "M" is the Injector Control relay (P/N 0 332 014 140, a plastic relay on my car). On the relay panel, the slot is marked "E13".

    L&M relays have identical P/Ns on older cars. On new cars, they are dissimilar. I don't want to jump to the conclusion that you have a newer series car simply because the L&M relays have dissimilar P/N's. Someone may have put dissimilar P/N relays in there by mistake.

    I have the later series (and a photo of the panel if required). I just realised the relay panel on my car (with the "E" lettering the right way up, but the relay lettering upside down) is upside down compared to the Owners Manual. If yours is upside down too, this might explain the mixup of relays. For what it's worth... My relays are correct, according to my OM.

    Hope this helps more than it hurts
    Cheers
    Ian.
     
  5. Qavion

    Qavion F1 World Champ
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  6. m.stojanovic

    m.stojanovic F1 Rookie
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    Miroljub Stojanovic
    #6 m.stojanovic, Oct 15, 2015
    Last edited by a moderator: Sep 7, 2017
    Is your fuse box like on the first or on the second diagram shown on the picture?

    The first is from the 1996 Owners Manual: L is 0 332 015 013, M is 0 332 014 140

    The second is from the Workshop Manual: L & M are both 0 332 014 140

    Note that the L & M positions are not the same on the two diagrams. 013 and 140 are positions N & O.
    Image Unavailable, Please Login
     
  7. m.stojanovic

    m.stojanovic F1 Rookie
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    I meant to say is "relays 013 and 140 are positions N & O on the Workshop Manual diagram"
     
  8. vracer

    vracer Formula 3

    Jun 23, 2014
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    Richard
    My fuse/relay box looks like the top one in white. 'L' is a 15A relay for the Injection Air Pump. 'M' is 30A for the Injector Control. Miroljub, would you be able to identify where the relays for those two functions are in the workshop manual? Since 'N' & 'O' have the same relays in the same positions, they are probably the same functions. It is obviously changed a bit, and I'm assuming that configuration is for an F1 car.

    Qavion, I'm not quite sure what you mean by early/late, however, '96 is the first year of the 5.2 cars. My L & M are both silver. It seems to me that your black 'M' relay is 30A, but the number appears different, 332 190 014. (Is that right? it is hard to read.) I wonder if it might have been changed at some time? I'm assuming your car is a manual '98.

    As I said to start this whole thing, my car ran perfectly for two years with the relays in the "wrong" places. Then it started twice and wouldn't start again after I put the relays in the "right" places. The minute I replaced the 15A with a spare, and returned the relays to their "wrong" position, it fired right up.

    To add another small mystery, the offending 15A tested perfectly in another position. I had assumed that it had blown like a fuse, but it hadn't. While I know the basic function of a relay, I have no idea what happens if they are over or under powered.

    I guess I will just have to put a note in my box that 'wrong' is 'right'. At least my box isn't upside down like Qavion's. ;) I appreciate your input.
    Richard
     
  9. Qavion

    Qavion F1 World Champ
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    Seems there are more variations than I thought. By early and late, I meant pre-/post- 5.2. However, I have seen minor Ferrari electrical differences based on assembly number. e.g. early 5.2's have a "Turn Signal Accoustic Repeater", later 5.2's don't.

    Seems you're right, the black relays on mine don't match the manual. My black relay is 0 332 019 140. I was probably only looking at the last 3 digits. Thankfully, according to AllFerrariParts.com, the 019 is compatible with everything from Testarossas to 550's.

    For future reference, I found this on another part of the forum

    "I just got off the phone with Bosch USA and part #: 0 332 014 140 has been superceeded with part #: 0 332 014 113". The 113's are readily available/cheap.

    Not sure if it has been changed. There is another one with the same number, however, so perhaps it came out of the factory like that. Yes, my car is a '98 manual.

    I don't think they're designed to act like a fuse. I think if the currents got too high, the fuse in the circuit would blow before the relay started showing fuse-like characteristics :) I'm more inclined to think that the device which turns on the relay may not have enough power to activate the relay. One relay type may need less coil current to activate than another type. If the engine ECU is responsible for activating the relay, then perhaps there might be a relay driver circuit problem in the ECU (worst case scenario) .. or... perhaps there is simply a high resistance in the wiring going from the Engine ECU to the coil contacts of the relay holder. The fact that the relay works in another position fits in with this theory. Unfortunately, I don't have wiring diagrams for the 5.2, so I can't suggest a likely point of high resistance other than a badly crimped relay holder spade.

    Personally, I would be tempted to look further into the matter (especially if you have a 15 amp relay in a 30 amp position), but, if the car has been running fine for 2 years... some might be tempted to look the other way ;)

    Cheers,
    Ian
     

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