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Rear Wiper Arm & Rear light Bulb

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Mr. Detail
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Rear Wiper Arm & Rear light Bulb

Post by Mr. Detail »

Hello all. I have two questions on different topics in one here and I hope that is acceptable by my moderator. if not, let me know and I will accept my punishment. :oops:

A) I need to replace a broken rear wiper arm but I am not sure how to get the broken one off. It looks simple enough as I can visibly see the nut although access seems difficult. Any thoughts on this fix?

B) I have tried to get what they call the left rear fog light bulb to work again but thus far after buying several bulbs none light up yet. The old burned out bulb is imprinted with a "7506" on it and the last bulb I bought was a "1156" which is supposed to be the same bulb. Is my bulb holder shot or hopefully it is not the flexible mylar circuit board.

Thanks!
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RickHaleParker
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Re: Rear Wiper Arm & Rear light Bulb

Post by RickHaleParker »

A)
1. Fold up the cover
2. Remove the nut
3. Detach the arm and blade.
Note: there are two different rear wiper arms. Which one you need depends on your chassis number.

B)
7506 and 1156 are very similar but they aren't identical. They are functionally interchangeable. If the base of the 1156 is plain brass instead nickel-plated,coat the sides of the base with silicone dielectric grease or Vaseline. It helps prevent galvanic corrosion.

10/53 Rear Fog, Left
2/49 Relay, Rear Fog
20/29 Shunt, Fog Light REM.
2019-11-05.png
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Mr. Detail
Posts: 383
Joined: Wed May 03, 2006 11:21 am
Year and Model: 2002 V70 N/A
Location: Newtown Square, Pennsylvania
Has thanked: 24 times
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Re: Rear Wiper Arm & Rear light Bulb

Post by Mr. Detail »

Thanks Mr. Parker.
I was afraid to pull up too much on that wiper cover. Got it now.
On the bulb issue, I just ordered two "7506" bulbs from Amazon which would be a direct match to what was originally in the bulb holder. If that doesn't work what is my next step? New/used bulb holder?
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RickHaleParker
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Re: Rear Wiper Arm & Rear light Bulb

Post by RickHaleParker »

Mr. Detail wrote: Wed Nov 06, 2019 7:07 am If that doesn't work what is my next step? New/used bulb holder?
I would check relay 2/49. Find a point where the circuit is working then work down stream from there.

Put your finger on 2/49 (Rear Fog Light Relay) have somebody switch the rear Fog Light on and off. Is the Relay clicking?
2019-11-06.png
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
CabezaDeVaca
Posts: 3
Joined: Tue Jan 15, 2019 2:35 pm
Year and Model: Xc70
Location: Boston

Re: Rear Wiper Arm & Rear light Bulb

Post by CabezaDeVaca »

Mr. Detail wrote: Wed Nov 06, 2019 7:07 am I was afraid to pull up too much on that wiper cover. Got it now.
The arm may be seized as in my case. By a "wiper arm puller", it is ~$12 on Amazon
CabezaDeVaca
Posts: 3
Joined: Tue Jan 15, 2019 2:35 pm
Year and Model: Xc70
Location: Boston

Re: Rear Wiper Arm & Rear light Bulb

Post by CabezaDeVaca »

Mr. Detail wrote: Wed Nov 06, 2019 7:07 am I was afraid to pull up too much on that wiper cover. Got it now.
The arm may be seized as in my case. Buy a "wiper arm puller", it is ~$12 on Amazon
CabezaDeVaca
Posts: 3
Joined: Tue Jan 15, 2019 2:35 pm
Year and Model: Xc70
Location: Boston

Re: Rear Wiper Arm & Rear light Bulb

Post by CabezaDeVaca »

Mr. Detail wrote: Wed Nov 06, 2019 7:07 am I was afraid to pull up too much on that wiper cover. Got it now.
The arm may be seized as it was in my case. Buy a "wiper arm puller" then, it is ~$12 on Amazon
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