Wiring diagram for headlight wipers on a 1974 2002 turbo

[Oldtimerfahrer]

Hi,

A friend is restoring a 1974 turbo that was originally sold in Sweden. He has the motors, arms etc., but no wiring to connect it. My factory manual does not show any separate wiring schematics for a "Scandinavian" market 2002, only US and general European market. I searched here in the forum and found some discussions about, it but no example or evidence that such a thing exists. I understand they were "standard" in Sweden, but may have been dealer standard additions for that market. I saw also a discussion about a harness, but without the schematic its difficult to say how the wiring was intended. In Google I get too many hits for modern BMWs and individual parts for this system for sale, but no diagram and no harness. If anyone has one, or has tips on reconstructing one, it would be appreciated ( how the motors connect to the relays, connections to wiper and washer switches etc.).

Andrew

[Conserv]

Andrew,

 

Although clearly not providing wiring diagrams, do the parts schematics and listings — these are from RealOEM.com — provide any glimpses or hints?

 

The full BMW parts manual would provide a bit more data with respect to parts omitted from the edited-down versions shown by RealOEM.com.

Headlight washers and wipers were a factory and dealer option on all Euro-spec square taillight cars, and perhaps earlier. I still see the OEM retrofit kits on eBay occasionally. I’ll bet they come with full wiring instructions (and harnesses, by the way). Perhaps someone with one of those kits could share the instructions.

 

Best regards,

 

Steve

 

 

[Oldtimerfahrer]

Hi,

Thanks Steve! I went and looked in the BMW classic webshop, which only shows currently available parts and forgot to look at realoem. I guess if we compare the part numbers, maybe its possible to understand whether these are separate relays or whether these replace part or all of the original non-headlight wiper relays...Since there are no switches, it must be activated by nr. 19. Presumably 13 just piggy-backs off the original pump. Will have to think about this and look at the harness in the vehicle at the present time.

Regards,

Andrew

[Conserv]

32 minutes ago, Oldtimerfahrer said:

Hi,

Thanks Steve! I went and looked in the BMW classic webshop, which only shows currently available parts and forgot to look at realoem. I guess if we compare the part numbers, maybe its possible to understand whether these are separate relays or whether these replace part or all of the original non-headlight wiper relays...Since there are no switches, it must be activated by nr. 19. Presumably 13 just piggy-backs off the original pump. Will have to think about this and look at the harness in the vehicle at the present time.

Regards,

Andrew

 

And I had similar questions, Andrew. Did headlight washer cars have two separate reservoirs and pumps? How are the headlight wipers and washers switched on and off? Let me look at my copy of the ca. 1976 parts book, when I get home. Maybe it has more info.

 

(Back in the 1970's, I dreamed of installing this system -- just because it seemed so cool!)

 

Best regards,

 

Steve

 

[Oldtimerfahrer]

My long sold off E12 528i had them, I thought they were cool looking too. But I don't remember ever noticing if they actually worked....or how they were wired up...

Andrew

[Mike Self]

13 hours ago, Conserv said:

How are the headlight wipers and washers switched on and off? Let me look at my copy of the ca. 1976 parts book, when I get home. Maybe it has more info.

I just checked the electrical section in my factory shop manual--neither the wiring diagrams nor the narrative sections show or mention the headlight wash/wipe circuit or hardware.  IIRC cars so equipped had a much larger reservoir that served both the windshield washer and headlight washers; what I don't remember is if there were two pumps--one for each system, or whether activating the headlight wash/wipe also activated the windshield wash/wipe sequence.  It's difficult to tell from the parts book, but the larger reservoir bottle seems to have only one outlet, and that serves the headlight washer system, so perhaps there were two separate bottle/pump systems on cars equipped with headlight wash/wipe systems

 

Checking the parts book, it does show a different part number for both the washer bottle and pump on  cars destined for Sweden--see pg 61-25 and 26.  The bottles seem to be different shapes (and sizes) and the pumps carry different part numbers, but look similar in the drawings.  Have no idea why...

 

mike

[Oldtimerfahrer]

Looking at part 13 in the second diagram, I would guess it's a second pump fed from the pigtail wiring with separate everything....but does the wiper relay differ...Do the wipers wipe synchronously with the windshield wipers and the washer with the windshield washer...? 

Andrew 

[Conserv]

Andrew,

 

Below are Sections 61-23, 61-24, 61-25, and 61-26 from the parts manual. My copies of the manual appear to have last been updated in 1976. Although 61-24 relates to the windshield washers, 61-23, 61-25, and 61-26 relate to the headlight wiping and washing system.

 

There do appear to be at least two pumps on cars with headlight washers. I’m guessing one for the windshield washers and one for the headlight washers. ? Besides images in two schematics that “look like” double-pump assemblies, 61-26 shows part number 61671359117 as “Wash pump kpl.”, short for “Wash pump complete”, (with a quantity of 1 per vehicle) and part number 61671359115 as “Wash pump individual” (with a quantity of 2 per vehicle).
 

61-25 appears to show a reservoir with a single outlet that simultaneously feeds both pumps. 61-26 appears to show a reservoir with two outlets, but one outlet appears to connect to a tee in the post-pump line. I have no clue what that’s doing! ? Both 61-25 and 61-26 appear to have been updated in late 1975, so both versions of reservoirs appear to remain available simultaneously.

 

As Mike also pointed to, on 61-26, the reservoir (“Fluid container”) and “Wash pump individual” marked with an “S” in an oval are those stipulated for Swedish cars. Good luck trying to figure out how the Swedish parts were different from the rest-of-the-world parts! A good Swedish car nerd might know exactly why Swedish systems were distinctive — no doubt a result of their regulations. If the parts your friend has are, indeed, original to his turbo — and were not, over the last 46 years, swapped out — you might be sufficiently lucky to have the correct parts. Frankly, I’m pretty fussy, but if it were my turbo, I probably wouldn’t sweat the difference between the Swedish and the rest-of-the-world systems! (OK, maybe I’d set up eBay automatic search strings on those two part numbers. Somewhere, a couple NOS examples are still around!)
 

Given what I see here, I’m now guessing — emphasis on “guessing” — that activating the windshield washers simultaneously activated the headlight washers. So the twin pumps would have been wired in parallel. Maybe!

 

Best regards,

 

Steve

 

[Oldtimerfahrer]

Thanks a million! My friend will have to improvise based on the infos. The car is an original swedish market car, with strange seat belts. Had been tuned with modern turbo and other things, but is now going back to a more original condition. The owner doesn't seem to be too picky on the originality, though a shop that restores Ferarri 250s is doing the rebuild....

Thanks again, 

Andrew