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Switch and box
http://www.ebay.com/itm/67-79-Ford-Truck-78-79-Ford-Bronco-Intermittent-wiper-Switch-/131381946890?pt=Vintage_Car_Truck_Parts_Accessories&hash=item1e96f96a0a&vxp=mtr
I researched this on this site a while back and came to the conclusion that all I needed was this (upgrading from non-intermitent).
That's not the case though is it - I also need a control box, correct?
You're correct, you also need the control box. Once you get that, it's all plug n' play.
They are here quite often. http://www.ebay.com/itm/1976-1979-Ford-Truck-Wiper-Delay-adapts-to-early-Ford-Broncos-/331422222394?pt=Motors_Car_Truck_Parts_Accessories&hash=item4d2a4dc83a&vxp=mtr
From what I understand you need the intermittent w/s switch and control box. Here is some old info, but it might help.
Two different types of windshield wipers, two different wiper switches. Two speed wiper switches have a low & high speed.
Intermittent (delay) wipers were optional on 1973/79 F100/350's and 1978/79 Bronco's. Intermittent is not another name for low speed!
DOOZ-17A553-A .. Two Speed Wiper Switch-Not used with intermittent wipers (Motorcraft SW-896) / Marked: D0OB-17A553-A or D / Obsolete
1973/79 F100/350 / 1978/79 Bronco // 1970/71 Fairlane/Torino/Montego / 1970/72 Maverick/Comet.
SUSANVILLE FORD in Susanville CA = 530-257-2137.
NOS ONLY in San Jose CA = 800-667-6659.
WESLEY OBSOLETE PARTS in Liberty KY = 606-787-5293.
GREEN SALES CO. in Cincinnati OH = 800-543-4959.
D1OZ-17A553-A .. Two Speed Wiper Switch-Used with intermittent wipers (Motorcraft SW-1010) / Marked: D1OB-17A553-AA / Obsolete
1973/79 F100/350 / 1978/79 Bronco // 1971 Fairlane/Torino/Montego.
NOS ONLY
BURNS FORD in Burns OR = 541-573-7278.
WESLEY OBSOLETE PARTS
GREEN SALES CO.
DON'S TRUCK SALES in Fairbank IA has 1 = 319-365-2751.
MCDONALD OBSOLETE PARTS CO. in Rockport IN has 1 = 812-359-4965.
WESLEY OBSOLETE PARTS in Liberty KY has 2 = 606-787-5293.
GREEN SALES CO. in Cincinnati OH has 10 = 800-543-4959.
CARPENTER NOS OBSOLETE PARTS in Concord NC has 45 = 800-476-9653.
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There are TWO different intermittent wiper governors. 1973/77 is one type, 1978/79 is another.
I started to do this a few years back and stalled.
I got a control box from E bay, and bought a new intermittent switch. Things physically plugged together. The result wasn't right. If I remember correctly, during the intermintent part of the switch, I'd get one single swipe, and then during low speed, I got high speed, aside for Off, that's all I got.
I still have the parts but gave up. I think I read somewhere more recently that I might have to do some kind of wiring modification. I thought at the time that maybe there was some kind of cold solder situation inside the control box? Or am I reading that there are two styles of control box and intermintent switch that need to match?
I drove mine today first time in the misty rain and realized I don't have the desirable delay feature. I found a new NOS switch on eBay if anyone is still interested.
I kept looking and found a control box, switch and harness (used) for quite a bit less than the new switch so I bought it. I installed some new Rain-X (16") wiper blades too. Much better than the rotten things I had on it. The first set I got from Wally World were 15" and did not come with the bayonet adapter so back they went. They were also much shorter than the ones the PO installed too.